Yücel Balbay

Yüksek İhtisas Hastanesi, Ankara, Engüri, Ankara, Turkey

Are you Yücel Balbay?

Claim your profile

Publications (27)53.64 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Objectives: In this article, our aims were to analyze and assess the data related to coronary revascularization rates, particularly in recent years. Study design: For this purpose, results of important studies, statistics of the Organisation for Economic Co-operation and Development (OECD) countries and data from Turkey's Social Security Agency (SSA) were analyzed for the first time. Until recently, there has been no healthy digital database regarding revascularization rates in Turkey. In the years following the establishment of SSA, it became possible to collect and analyze data obtained from the Medulla database of the Agency. Using the data from the Agency for the period 2009-2011, revascularization rates and cost analyses were performed. Results: Between 2000 and 2010 in European countries as well as in other OECD countries, the percutaneous coronary intervention (PCI) rate was on average 75% of the total revascularization rate and neared 80%. In some countries, the rate has exceeded 85%. In our country, in 2009, 2010 and 2011, the number of coronary angiography procedures and as a result PCI has steadily increased. The rate for PCI was 66.8% in 2009, but it increased to 74% in 2011. At the same time, PCI accounted for 2/3-4/5 of all revascularization procedures. In the cost analysis, however, PCI constituted only 1/5-1/4 of the costs of all revascularization procedures. Conclusion: This report is the first analysis in this area and it gives an initial idea about the current situation of the numerical and financial aspects. This analysis has provided the opportunity to obtain more accurate information about coronary revascularization rates in Turkey and to compare the data to that of other countries.
    Turk Kardiyoloji Dernegi arsivi: Turk Kardiyoloji Derneginin yayin organidir 04/2014; 42(3):245-52.
  • International Journal of Cardiology 03/2011; 147. DOI:10.1016/S0167-5273(11)70251-0 · 4.04 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Objective: Autologous saphenous veins are widely used for coronary artery bypass surgery (CABG) despite a higher incidence of graft closure. Early initiation of antiplatelet drugs reduces the incidence of graft occlusions. In this study, we assessed the aspirin resistance by PEA-100 (R) (Platelet Function Analyzer) system in the patients with saphenous vein graft (SVG) occlusion. Material and Methods: Fourty-four patients who underwent cardiac catheterization were evaluated. Patients were divided into two groups according to SVG patency. Patients with occluded SVG were compared with patients with patent SVG in terms of clinical, angiographical and laboratory parameters. Results: Thirteen of 44 (29.5%) patients were aspirin non-responder. The number of non-responders in patients with and without occlusion in SVG were similar (35% vs 24%, p = 0.4). Basal characteristics and mean aperture closure time/ADP (CT/ADP), aperture closure time/epinephrine (CT/EPI) values were similar in patients with occluded and patent SVGs. Hyperlipidemia was only significantly increased the risk of SVG occlusion in multivariate analysis. There was no significant difference between aspirin responders and nonresponders in terms of clinical parameters, major cardiovascular risk factors, occlusion in SVGs in any time period. However, mean platelet volume, CT/EPI and CT/ADP values were higher in the non-responder group. CT/EPI was negatively correlated with mean platelet volume and hematocrit levels. Conclusion: Aspirin resistance does not seem to play an important role in SVG occlusion.
    Turkiye Klinikleri Journal of Medical Sciences 04/2010; 30(2):603-609. DOI:10.5336/medsci.2008-8472 · 0.10 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Despite recent improvements in diagnostic and therapeutic interventions, infective endocarditis (IE) is still associated with high in-hospital mortality rates. The study aim was to determine the clinical, laboratory and echocardiographic features of IE, and to evaluate the risk factors for in-hospital mortality. A retrospective cohort study design was employed, with a main outcome measure of in-hospital mortality. A total of 107 patients (79 males, 28 females; mean age 45 +/- 16 years) admitted with the modified Duke criteria for definitive IE were included in the study during a five-year period between January 2004 and December 2008. Among the patients, the mitral valve alone was involved in 45% of cases, the aortic valve in 36%, tricuspid valve in 11%, and multiple valves in 8%. Forty-seven patients (44%) had prosthetic valves. Blood cultures were positive in 71 patients (66%). The most common isolated microorganisms were staphylococci, streptococci and Brucella melitensis. The in-hospital mortality rate was 27%. Leading causes of death were multi-organ failure and heart failure. In univariate analysis, factors associated with death were a longer duration of symptoms before hospitalization, previous history of IE, white blood cell count > or = 10,000/mm3, serum creatinine level > or = 2 mg/dl, vegetation size >15 mm, involvement of multiple valves, existence of severe regurgitation, cardiac abscess, and neurologic complications. Multivariate analysis showed that risk factors for mortality were multivalvular involvement (hazard ratio (HR) 4.7; 95% confidence interval (CI) 1.3-17.6; p = 0.021), vegetation size >15 mm (HR 5.5; 95% CI 2.1-14.6; p = 0.001), serum creatinine > or = 2 mg/dl (HR 4.1; 95% CI 1.8-9.4; p = 0.001), and previous history of IE (HR 3.5; 95% CI 1.2-11; p = 0.026). Multivalvular involvement, vegetation length >15 mm, serum creatinine level > or = 2 mg/dl on admission, and a previous history of IE, were independent predictors for in-hospital mortality in IE.
    The Journal of heart valve disease 03/2010; 19(2):216-24. · 0.75 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: It has been shown that serum uric acid (SUA) constitutes an important independent risk factor for cardiovascular disease. We investigated SUA levels in patients with coronary artery ectasia (CAE). Serum uric acid levels were measured in three groups of patients who underwent coronary angiography. One group consisted of 97 consecutive patients (69 males, 28 females; mean age 58.1+/-9.5 years) with isolated CAE, another group included 104 patients (79 males, 25 females; mean age 58.4+/-8.8 years) with coronary artery disease (CAD), and finally 90 subjects (66 males, 24 females; mean age 57.6+/-10.1 years) with normal coronary arteries comprised the control group. Coronary artery ectasia was defined as a luminal dilatation of at least 1.5 times of the adjacent normal coronary segments, without any stenotic lesions. In addition, patients with CAE were assessed in four groups of severity and extension. The three groups were similar with respect to age, sex, body mass index, and the frequencies of hypertension, diabetes mellitus, and smoking (p>0.05). The mean SUA level did not differ significantly between the CAE and CAD groups (6.6+/-1.9 mg/dl and 6.3+/-1.9 mg/dl, respectively; p=0.184); however, compared with the control group (5.4+/-1.8 mg/dl), SUA levels were significantly higher in both groups (p<0.001). A significant correlation was found between the SUA level and the presence of isolated CAE (r=0.625; p<0.001). Multivariate logistic regression analysis showed an independent relationship between isolated CAE and SUA (OR 1.896; 95% CI 1.1048-1.5014; p<0.001). Serum uric acid levels did not differ significantly among the four subgroups of CAE severity. Our study is the first to demonstrate significantly increased SUA levels in patients with isolated CAE. Our results support relevant data suggesting an association between endothelial function and the SUA level.
    Turk Kardiyoloji Dernegi arsivi: Turk Kardiyoloji Derneginin yayin organidir 10/2009; 37(7):467-72.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Arising of right coronary artery from left anterior descending artery is a very rare anomaly. We present a case with this anomaly that was also demonstrated with multislice computed tomography.
    International journal of cardiology 01/2009; 139(3):e42-3. DOI:10.1016/j.ijcard.2008.11.009 · 4.04 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Although QRS-complex changes during ischemia have been described previously, their relation with no-reflow is not clear. To evaluate relation of admission QRS duration with angiographic no-reflow, we studied 162 patients who underwent primary angioplasty. Twelve-lead electrocardiogram with a paper speed of 50 mm/s was recorded on admission and repeated after angioplasty. Patients were divided into reflow and no-reflow groups based on postangioplasty coronary thrombolysis in myocardial infarction flow grade. Patients in the no-reflow group (26 patients) were older (P = .001) and had significantly longer pain-to-balloon interval (P = .007). The patients in the no-reflow group had significantly longer QRS duration on admission electrocardiogram compared with patients in the reflow group (interquartile range, 80-93 [median, 84] milliseconds vs 60-80 [median, 76] milliseconds, respectively; P < .001). After adjusting all variables, QRS duration on admission was found to be independently related to angiographic no-reflow (odds ratio, 1.07; 95% confidence interval, 1.02-1.12; P = .003). QRS duration on admission may be valuable in predicting no-reflow.
    Journal of electrocardiology 01/2008; 41(1):72-7. DOI:10.1016/j.jelectrocard.2007.07.004 · 1.36 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: To determine whether pulmonary vascular bed contributes to the development of in situ thrombosis and vascular remodelling in secondary pulmonary hypertension (SPH) via changes in its local secretory activities. Seventy-one patients with the diagnosis of secondary pulmonary hypertension (38 females, mean age 40.36+/-1.05 years) were included in the study. Selective right and left heart catheterization was performed to each patient for diagnostic purposes. Blood samples obtained from left ventricle (LV) and pulmonary artery (PA) of each patient were analyzed for levels of plasminogen activator inhibitor-1 (PAI-1), platelet derived growth factor (PDGF), vascular endothelial growth factor (VEGF), D-dimer, von Willebrand factor (vWF), protein-C, antithrombin-III, fibrinogen, and plasminogen. Results were compared between LV and PA. Correlation analysis between each parameter and mean pulmonary artery pressure (MPAP) was performed. Although mean level of VEGF in LV and PA were found to be in normal range, it was significantly higher in LV than in PA (p<0.001). Mean PDGF and D-dimer levels, which remained in normal range were also higher in LV (p<0.001 and p<0.001, respectively) than in PA;.vWF showed similar degree of elevation in both LV and PA. Only one parameter, PAI-1, was found to be significantly higher in PA than in LV (p=0.012). Antithrombin-III, protein C, plasminogen, and fibrinogen levels showed no significant differences between two chambers. They also remained in normal range, except for fibrinogen, which was slightly elevated in both LV and PA. Correlation analysis revealed strong positive correlation between D-dimer level in both LV and PA and MPAP (r=0.775, p<0.001 and r=0.649, p<0.001, respectively). In SPH, pulmonary vascular bed shows increased thrombotic, hypofibrinolytic, and proliferative activities, which are partially related to the severity of illness.
    Anadolu kardiyoloji dergisi: AKD = the Anatolian journal of cardiology 07/2005; 5(2):95-100. · 0.93 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The protective effects and the prognostic importance of collaterals during and after acute myocardial infarction (MI) are under debate and heart rate variability (HRV) is a strong predictor of risk of mortality and arrhythmic events after acute MI. We aimed to examine the effects of collateral circulation on HRV in the early period after acute MI. Sixty-four patients admitted to our clinics who were diagnosed with acute anterior MI and underwent thrombolytic therapy were enrolled in this study. We applied 24 h Holter monitoring for HRV analysis to all patients and compared the patients with and without collaterals to the infarct-related artery. Mean heart rate, low frequency (LF) (day, night and 24 h) and LF/high frequency (HF) (day, night and 24 h) were higher, SD of all NN intervals (SDNN), root mean square of successive differences (RMSSD), number of NN intervals that differed by more than 50 ms from the adjacent interval divided by the total number of all NN intervals (PNN50) and HF night values were lower in patients without collaterals than in those with collaterals. SDNN was negatively correlated with left anterior descending coronary artery (LAD) stenosis, ventricle score indices and left ventricular ejection fraction (LVEF); LF/HF ratio was positively correlated with ventricle score indices and negatively correlated with LVEF and Thrombolysis in Myocardial Infarction flow grade. Linear regression analysis showed that ventricle score index and coronary collaterals affect HRV and LAD stenosis, ventricle score, LVEF and coronary collaterals affect LF/HF ratio. A SDNN <80 ms increased the development of ventricular arrhythmias in the early period by 4.7 fold, a LF/HF ratio >2.7 increased it by 9.8 fold and a LVEF <35% increased it by 12.8 fold, whereas the presence of well-developed collaterals decreased the arrhythmia development by 2.5 fold. The collaterals to the infarct-related artery have great impact on HRV, autonomic nervous system activity and the development of ventricular arrhythmias in patients with acute anterior MI. Our results suggest a protective role of collaterals on myocardial electrophysiology in the early period after acute MI.
    Coronary Artery Disease 12/2004; 15(7):405-11. DOI:10.1097/00019501-200411000-00007 · 1.50 Impact Factor
  • Mehmet Birhan Yilmaz · Yücel Balbay · Sule Korkmaz
    [Show abstract] [Hide abstract]
    ABSTRACT: Aspirin is an effective antithrombotic agent for many patients. However, patients taking aspirin might exhibit variable responses to in vitro tests for platelet aggregation and might experience breakthrough thromboembolic events. Although this phenomenon has been called aspirin resistance, the lack of an uniform definition or agreement on diagnostic criteria precludes definitive recommendations at this time. Aspirin resistance has been defined in patients with cardiovascular, cerebrovascular, and peripheral vascular disease. In this article, mechanisms related with aspirin resistance and clinical background in which resistance is defined, are reviewed.
    Anadolu kardiyoloji dergisi: AKD = the Anatolian journal of cardiology 04/2004; 4(1):59-62. · 0.93 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Increased mean platelet volume (MPV) may reflect increased platelet activation or increased numbers of large, hyperaggregable platelets, and is accepted as an independent coronary risk factor. The adrenergic system has effects on platelet activation and thrombocytopoiesis. To assess the effects of autonomic nervous system activity on MPV in patients with acute myocardial infarction (MI). Forty-seven patients with acute anterior MI were compared with 32 patients with healthy coronary arteries. All patients underwent heart rate (HR) variability analysis using 24 h Holter monitoring. Blood samples were taken for MPV measurements twice a day (day- and nighttime) during Holter monitoring. Mean HR, low frequency band of HR variability power spectrum to high frequency band of HR variability power spectrum (LF:HF) ratio, LF and MPV were higher in patients with anterior MI than in the control group. SD of all NN (RR) intervals, root mean square of successive differences, number of NN intervals that differed by more than 50 ms from the adjacent interval divided by the total number of all NN intervals, HF bands and platelet counts were lower in the patients with anterior MI than in the control group. Daytime LF bands, LF:HF ratio and MPV were significantly higher, and HF bands were significantly lower than the nighttime values for both groups. The differences in daytime and nighttime measurements were more significant in the patients with acute MI than in the control group. Pearson's correlation analysis showed that MPV was positively correlated with ventricle score, degree of left anterior descending artery stenosis, mean HR, LF bands and LF:HF ratio; and negatively correlated with the SD of all NN intervals, HF bands and platelet count. Multivariate analysis revealed that MPV was significantly affected by ventricle score and the LF:HF ratio. MPV was significantly higher in the patients with acute MI. In both groups, MPV showed great daytime and nighttime variation, which can be attributed to alterations in the autonomic nervous system. The authors suggest that the prognostic role of increased MPV in patients with acute MI is closely associated with increased sympathetic activity and decreased HR variability.
    Experimental and clinical cardiology 02/2004; 9(4):243-7. · 0.76 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study was performed to evaluate whether coexistent diabetes mellitus has any adverse effect on the outcomes of thrombolytic therapy in patients with acute myocardial infarction. Although the early reperfusion rates were similar between the two groups of patients who had acute myocardial infarction with and without diabetes mellitus (42% vs 45.4%, p > 0.05), the results of late angiographic examination showed a significantly lower rate of patency in infarct-related coronary artery (defined as TIMI 3 flow) in diabetics compared to nondiabetics (28.9% vs 41.3%, p < 0.001). The global left ventricular function was also poorer in diabetics (left ventricular wall motion score was 18.6 +/- 7.3 in diabetics and 14.1 +/- 4.6 in nondiabetics, p < 0.01).
    Angiology 07/2003; 54(4):449-56. DOI:10.1177/000331970305400409 · 2.97 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Occurrence of AF in a pacemaker implanted patient is a significant cause of morbidity and mortality. The aim of this study was to prospectively investigate the clinical, echocardiographic, and electrocardiographic determinants of persistent AF in patients with DDD pacemakers. A 101 consecutive patients were followed for an average of 19.8 +/- 11.8 months. Persistent AF was documented in 21 (20.8%) patients and 80 (79.2%) patients were in sinus or physiologically paced rhythm. In patients with persistent AF, previous AF attacks were observed more frequently (P < 0.03) and left atrial dimension was higher (3.5 +/- 0.6 vs 3.0 +/- 0.5 cm, P < 0.001). Average P maximum and P wave dispersion (PWD) values calculated in a 12-lead surface electrocardiogram were also found to be significantly higher in patients with persistent AF (P < 0.001). Cox regression analysis demonstrated that the presence of previous AF attacks (RR 8.95, P < 0.001), increased left atrial dimension (RR 2.1, P < 0.02), P maximum duration 120 ms (RR 6.1, P < 0.001), and PWD 40 ms (RR 12.2, P < 0.001) were associated with an increased risk of persistent AF. Cut-off points were 120 ms for P maximum and 40 ms for PWD. Sensitivity, specificity, and positive and negative predictive values were calculated as 76.2, 82.5, 53.3, and 92.9 for P maximum and as 85.7, 87.5, 64.3, and 95.9 for PWD, respectively. In patients with DDD pacemakers, previous AF attacks, increased left atrial dimension, P maximum value of 120 ms, and a PWD value of 40 ms were associated with a significantly increased risk of persistent AF. These patients must further be managed with other treatment modalities to prevent the development of persistent AF.
    Pacing and Clinical Electrophysiology 03/2003; 26(3):719-24. DOI:10.1046/j.1460-9592.2003.00122.x · 1.13 Impact Factor
  • Y Balbay · H Tikiz · D Demir · N.S. Yelgec · S Korkmaz · A Saritas
    [Show abstract] [Hide abstract]
    ABSTRACT: A 15-year-old female patient presented with a history of a mass just medial to the left breast and fever. Her physical examination revealed upper extremity hypertension, delayed and diminished pulsations in the femoral arteries and a midsystolic murmur over the back. On catheterization of the aorta a 45 mmHg systolic pressure gradient was obtained across the coarctation segment. The selective left internal mammary artery angiography showed the relationship of distal portion with false aneurysm. A magnetic resonance scan showed a left parasternal mass extending anteriorly.
    International Journal of Cardiology 01/2002; 81(2-3):269-70. DOI:10.1016/S0167-5273(01)00556-3 · 4.04 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Previous studies have reported controversial results regarding the clinical and angiographic factors involved in the left ventricular aneurysm (LVA) formation after myocardial infarction (MI). This study was performed to determine the clinical and angiographic factors that are priori predictors of LVA following anterior myocardial infarction and so to provide a paradigm which may identify patients who were candidates for aneurysm formation. Of the patients who underwent coronary angiography during the interval between 1995 and 2000 in our clinic, 809 were found to have anterior MI and LVA (aneurysm group) (677 men, 132 women, mean age 53.3+/-11.4 years). The clinical and the angiographic data of these patients were compared with those of 446 patients (399 men, 47 women, mean age 55.2+/-10.5 years) with previous anterior MI and without LVA (control group). LVA was found to occur more frequently in females (16.3% in women and 10.4%, in men, P=0.03) and in patients without previous angina (23.5 vs. 8.2%, P<0.0001). Major cardiovascular risk factors, previous anti-anginal medication and thrombolytic therapy did not show a significant difference between the two groups. Angiographic examination revealed that single-vessel disease, proximal left anterior descending artery (LAD) stenosis, total LAD occlusion, mean stenosis in LAD artery, end-diastolic pressure and left ventricular score were all higher in the aneurysm group compared to control group. After adjustment for other clinical and angiographic variables, single-vessel disease [odds ratio (OR) 5.89, 95% confidence interval (CI)=3.68-9.28, P<0.0001), absence of previous angina (OR=4.21, 95% CI=2.1-7.48, P=0.0003), total LAD occlusion (OR=2.63, 95% CI=1.97-3.53, P<0.0017) and female gender (OR=1.60, 95% CI=1.20-2.28, P=0.043) remained the independent determinants of LVA formation after anterior MI. In patients with LVA, logistic regression analysis revealed that (1) single-vessel disease, (2) absence of previous angina, (3) total LAD occlusion and (4) female gender were independent determinants in the formation of LVA after anterior MI. Coronary collateral status and risk factors, such as hypertension, diabetes mellitus, hypercholesterolemia, smoking and family history of CAD were not found to be important determinants in the aneurysm formation.
    International Journal of Cardiology 01/2002; 82(1):7-14; discussion 14-6. DOI:10.1016/S0167-5273(01)00598-8 · 4.04 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Previous studies showed that increased QT dispersion (QTd) has been observed during episodes of myocardial ischemia or infarction and identify the patients at risk of arrhythmia or sudden death. The objective of this study is to investigate the relationship between coronary artery disease and QTd during the Valsalva maneuver. The study population included 85 subjects (21 with normal coronary arteries, 35 with stable angina pectoris, and 29 with unstable angina pectoris). Twelve-lead surface ECGs were recorded at 50-mm/sec paper speeds and were obtained before the Valsalva maneuver and during the strain phase. The results indicate a significant difference in mean time increase between the control group and the group with stable angina pectoris (mean difference = 16.10 milliseconds, p<0.000), and between the control group and the group with unstable angina pectoris (mean difference = 35.26 milliseconds, p<0.000). The mean difference in time between these groups was also compared (mean difference = 19.17 milliseconds), and was statistically significant (p<0.000). There are some conditions like constipation, severe coughing spells, nausea, vomiting, and carrying or lifting heavy objects that increase intrathoracic pressure and may increase QT dispersion. Therefore, all these conditions should be treated appropriately and carrying or lifting heavy objects is forbidden, especially in patients with coronary artery disease.
    Angiology 11/2001; 52(11):735-41. DOI:10.1177/000331970105201102 · 2.97 Impact Factor
  • Source
    H Tikiz · Y Balbay · R Atak · T Terzi · Y Genç · E Kütük
    [Show abstract] [Hide abstract]
    ABSTRACT: Although there is increasing evidence for the beneficial effect of thrombolytic therapy on global left ventricular (LV) function in acute myocardial infarction (AMI), the data concerning the early effect of thrombolytic therapy on the incidence of left ventricular aneurysm (LVA) formation and its relationship to clinical and angiographic determinants are limited. The study aimed to determine the independent factors involved in the development of LVA and to evaluate whether thrombolytic therapy has any preventive effect on the development of LVA in AMI. In all, 350 consecutive patients suffering from a first attack of AMI were included. Of these, 205 who arrived within 12 h of onset of symptoms received thrombolytic therapy (thrombolytic group) and the remaining 145 patients served as control group. All patients received aspirin and maximal-dose anticoagulation with intravenous heparin therapy. Early successful reperfusion was assessed by enzymatic and electrocardiographic evidence, and late vessel patency was evaluated according to Thrombolysis in Myocardial Infarction (TIMI) classification. Patients with TIMI grade 2 or 3 flow were considered to have vessel patency. The overall incidence of LVA was 11.7% (41/350), and no statistical difference was found between the incidence of LVA between the two groups (11.7 vs. 11.7%, p>0.05). However, the patients receiving thrombolytic therapy and exhibiting a patent infarct-related artery (PIRA) (n = 125, 61%), had a significantly reduced incidence of LVA compared with those who did not (7.2 vs. 18.8%, p= 0.015). In univariate analysis, vessel patency, proximal left anterior descending artery (LAD) stenosis, total LAD occlusion, multivessel disease, and hypertension were found to be important factors in LVA formation after AMI. After adjustment for other clinical and angiographic variables, total LAD occlusion (odds ratio [OR] 3.62,95% confidence interval [CI] 2.45-8.42, p = 0.0014), absence of PIRA (OR 2.92, 95% CI 1.41-09, p = 0.0037) and proximal LAD stenosis (OR 2.11, 95% CI 1.05-4.71, p = 0.045) remained the independent determinants of LVA formation after AMI. Our data indicate that not all patients who received thrombolytic therapy, but only those with PIRA had evidently reduced the incidence of LVA. Patients with total LAD occlusion, with proximal LAD stenosis, and without PIRA were found to have increased risk for formation of LVA after AMI. These findings indicate that the presence of vessel patency has a preventive effect on LVA formation in AMI.
    Clinical Cardiology 10/2001; 24(10):656-62. DOI:10.1002/clc.4960241005 · 2.59 Impact Factor
  • AD Demir · K Senen · Y Balbay · M Soylu · H Tikiz · S Korkmaz
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to investigate QT dispersion during atrial pacing in patients with coronary artery disease (CAD) without clinical ischemia, such as angina pectoris and ST segment depression. Thirteen patients with normal coronary arteries and 42 patients with CAD (12 with single-vessel, 16 with two-vessel and 14 with three-vessel disease) having no angina pectoris or ST segment depression during atrial pacing with maximum rate of 120/minute were enrolled in the study. Twelve-lead surface ECGs were recorded at 100 mm/second paper speed before pacing, at maximum pacing rate, and during the recovery period for measurement of QT interval parameters. Corrected QTd (QTcd) increased from 43.4 +/- 8.1 to 49.3 +/- 9.5 ms (p < 0.05) in the control group, from 46.1 +/- 8.1 to 74.3 +/- 7.7 ms (p < 0.0001) in the single-vessel disease group, from 48.5 +/- 10.4 to 93.8 +/- 22.1 ms in the two-vessel disease group (p < 0.0001), and from 49.7 +/- 13.6 to 128.5 +/- 31 ms (p < 0.0001) in the three-vessel disease group at peak atrial pacing period. A positive correlation was found between the severity of CAD and QTcd (r = 0.49, p < 0.0001). It was found that pacing-induced QTc dispersion identifies coronary disease extent, even when there is no ST depression or T wave inversion during pacing.
    Angiology 06/2001; 52(6):393-8. DOI:10.1177/000331970105200604 · 2.97 Impact Factor
  • Y Balbay · H Tikiz · R J Baptiste · S Ayaz · H Saşmaz · S Korkmaz
    [Show abstract] [Hide abstract]
    ABSTRACT: The changes in serum concentrations of cytokines such as interleukin-1 (IL-1) beta, interleukin-6 (IL-6), tumor necrosis factor (TNF) alpha and a soluble-intercellular adhesion molecule (sICAM-1) has been investigated in patients with stable angina and acute myocardial infarction. Thirty-four patients with stable angina (SA), 15 with acute myocardial infarction (AMI), and 20 subjects in the control (C) group were included in the study. The mean serum concentrations of sICAM-1, IL-1-beta, IL-6, and TNF-alpha differed significantly among the three groups. Serum concentrations of IL-1 beta, sICAM-1, and TNF-alpha were comparable in the AMI and SA groups and higher than those found in the C group (p < 0.001). The serum concentration of IL-6 was more than twice as high in the AMI group as compared to the other two groups (p < 0.001). The mean serum concentrations of IL-1 beta, TNF-alpha, and IL-6 were comparable in the AMI and SA groups and higher than in the C group.
    Angiology 03/2001; 52(2):109-14. · 2.97 Impact Factor
  • H Tikiz · T Terzi · Y Balbay · A D Demir · M Soylu · T Keles · E Kutuk
    [Show abstract] [Hide abstract]
    ABSTRACT: It has been shown that QT dispersion (QTD) increases during episodes of myocardial ischemia or infarction. However, no extensive data on the relation between the diseased coronary artery or the localization of stenosis and the QTD are available. The aim of the study was to examine the relation between QTD and diseased coronary artery and lesion localization during exercise stress test in patients with single coronary artery disease without prior myocardial infarction. One hundred nineteen patients with single coronary artery disease and 53 patients with normal coronary arteries were enrolled in study. All patients underwent exercise stress test with modified Bruce protocol, and QT interval parameters were measured at rest and at minute 2 of the recovery (rec-2) period. QT dispersion at rest was found higher in all single-vessel disease groups compared with that in the control group, and corrected QT dispersion at rec-2 period was also markedly higher in left anterior descending, circumflex, and right coronary artery groups compared with that in the control group. No relation was found between QT dispersion and diseased coronary artery or the lesion localization. In conclusion, no qualitative difference was found between QT dispersion and diseased coronary artery or proximal or distal lesion localization. However, it was observed that patients with single-vessel disease had wider baseline QT dispersion as compared with that in the control group, which further increased significantly with exercise. This finding supports the idea that severity of localized ischemia rather than extent of coronary artery disease would be expected to have a greater effect on inducible QT dispersion.
    Angiology 02/2001; 52(1):43-51. · 2.97 Impact Factor

Publication Stats

150 Citations
53.64 Total Impact Points


  • 2000–2009
    • Yüksek İhtisas Hastanesi, Ankara
      • Department of Cardiovascular Surgery
      Engüri, Ankara, Turkey
  • 2004
    • Yüksek İhtisas Hastanesi
      Кырыккале, Kırıkkale, Turkey
  • 2001
    • Case Western Reserve University
      Cleveland, Ohio, United States