Cardiology (Cardiology )

Publisher: Karger

Description

Cardiologyí features high-quality papers from all over the world to keep its readers regularly informed of current strategies in the prevention, diagnosis and treatment of heart disease. These papers not only describe but offer critical appraisals of new developments in non-invasive, invasive, diagnostic and therapeutic methods. The importance of experimental work is also acknowledged through reports covering the function and metabolism of the heart and the morphology and physiology of cardiovascular disease. Special sections in a variety of subspecialty areas reinforce the journalís value as a complete record of recent progress for all cardiologists, internists, cardiac surgeons and clinical physiologists.

  • Impact factor
    1.52
  • 5-year impact
    1.45
  • Cited half-life
    6.70
  • Immediacy index
    0.59
  • Eigenfactor
    0.00
  • Article influence
    0.46
  • Website
    Cardiology website
  • ISSN
    1421-9751
  • OCLC
    66586947
  • Material type
    Periodical
  • Document type
    Journal / Magazine / Newspaper

Publisher details

Karger

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • On author or institutional server
    • Server must be non-commercial
    • Publisher's version/PDF cannot be used, unless Authors Choice fee is paid
    • Publisher copyright and source must be acknowledged
    • Must link to publisher version
    • Articles in some journals can be made Open Access on payment of additional charge
  • Classification
    ​ green

Publications in this journal

  • [show abstract] [hide abstract]
    ABSTRACT: Objectives: To clarify whether the results of repair of a complex mitral lesion (Barlow valve) at the intermediate-term follow-up are independent of the mode of surgical access [minithoracotomy vs. median sternotomy (MS)]. Methods: In a prospective randomized study of mitral repair for Barlow disease using either a minimally invasive (MI) approach or MS, we achieved an average follow-up of 3 years (echocardiography, physical examination and quality of life). Mitral repair was achieved with polytetrafluoroethylene chordal implantation for both leaflets. Results: Both groups included 80 patients. Mechanical ventilation time and intensive care unit and hospital stay were shorter in the MI group (p = 0.01, p = 0.013 and p = 0.02, respectively). During the follow-up, 5 patients in each group (6.25%) displayed mild mitral regurgitation, while 2 patients in each group (2.5%) developed recurrent regurgitation graded as at least moderate/severe. The rate of mitral reoperation was 2.5% in the MI group and 1.25% in the MS group (p = 0.9). The overall follow-up mortality was 3.75% in both the MI and the MS groups. Conclusions: The 3-year results of repair of Barlow valves were satisfactory irrespective of the approach used to repair the valve. The advantages of MI surgery can be achieved in patients with mitral Barlow disease without concerns over the durability of repair. © 2014 S. Karger AG, Basel.
    Cardiology 04/2014; 128(2):97-105.
  • Cardiology 04/2014; 128(2):95-96.
  • Cardiology 03/2014; 128(2):92-94.
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    ABSTRACT: Objective: We have evaluated 106 pediatric cases of infective endocarditis (IE) to elucidate clinical manifestations and pathogenic microorganism profiling of IE in China. Methods: Clinical features, complications, pathogenic microorganisms, diagnosis and treatment of pediatric IE were reviewed in two groups of patients with IE from the different periods of time (group A, 34 cases obtained in the period from 2000 to 2011 and group B, 72 cases obtained in the period from 1964 to 1999). Results: A total of 106 pediatric patients with a definite diagnosis of IE based on the modified Duke criteria were enrolled and evaluated in this study. By comparing two groups of patients from different time periods, we found that the incidence of rheumatic heart disease was significantly reduced (from 19.4 to 5.9%), whereas congenital heart disease-associated IE had a tendency to increase (from 55.6 to 79.4%). Staphylococcus aureus was detected as the most common pathogenic microorganism, and its involvement tended to increase (from 32.0 to 58.5%), whereas the percentage of infections caused by Streptococcus viridans (8.0%) had not changed. It was interesting to note that the rate of vegetations detected was increased from 50.0 to 67.6% and the incidence of right-sided IE was also increased (from 35.0 to 60.9%). The most common valves involved in recent cases were tricuspid valves (increase from 30.0 to 47.8%), while mitral valve infection was reduced (from 60.0 to 39.1%). Penicillin was still the most commonly used antibiotic for the treatment of IE; the combination of penicillin plus cephalosporin has been recommended more and more recently. Conclusions: Comparing pediatric IE patients during the past 40 years, we found that the role of rheumatic heart disease as a predisposing factor is diminishing. Pediatric IE is still predominantly caused by staphylococci. The most commonly involved valves are tricuspid valves instead of mitral valves. Gram-positive bacteria showed an increased resistance to penicillin when used alone, and the use of combination treatment with antibiotics is increasing in the area. © 2014 S. Karger AG, Basel.
    Cardiology 03/2014; 128(2):88-91.
  • Cardiology 03/2014; 128(2):86-87.
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    ABSTRACT: Contrast-induced nephropathy (CIN) is a well-known adverse event of therapeutic and diagnostic procedures requiring the adminstration of contrast medium (CM). The lack of a universal CIN definition and glomerular filtration rate markers that vary have resulted in a variety of reported incidences. The development of CIN is associated with an increase in the length of hospital stay and the risk of death. Preexisting renal dysfunction, age, diabetes, congestive heart failure and the volume of CM administered are all associated with a risk for developing CIN. The literature suggests the use of low-osmolarity CM and supports volume supplementation before administration. Moreover, other strategies to avoid CIN, including treatment with N-acetylcisteine and sodium bicarbonate have variable levels of evidence. This review examines the main components of the pathogenesis and risk factors of CIN and possible preventive measures and therapies. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(1):62-72.
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    ABSTRACT: Objective: To investigate whether triptolide can prolong the survival of rat mesenchymal stem cells (MSCs) transfected with the mouse hyperpolarization-activated cyclic nucleotide-gated channel 4 (mHCN4) gene in the myocardium. Methods: Grafted cell survival was determined using a sex-mismatched cell transplantation model and analysis of Y chromosome-specific Sry gene expression from hearts harvested at different time points after cell transplantation. ELISA and RT-PCR were used to measure protein and mRNA levels, respectively, of nuclear factor (NF)-κB, IL-1β, IL-6 and TNF-α. Results: Donor cell numbers decreased over time. Pretreatment with triptolide improved graft survival both 24 (29.3 ± 0.9%) and 72 h (17.5 ± 1.2%) after transplantation of MSCs and resulted in a 2.5-fold increase in the total cell number 72 h after cell transplantation. The mRNA expression and protein content of NF-κB, IL-1β, IL-6 and TNF-α were significantly reduced in the triptolide-treated group compared with the control groups. In addition, triptolide downregulated Bax but upregulated Bcl-2 in the injected region. Conclusions: Transient treatment with triptolide may significantly improve the early survival of MSCs in vivo. The mechanism underlying this effect involves attenuating the inflammatory response via inhibition of the NF-κB signaling pathway. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(2):73-85.
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    ABSTRACT: Background: Aortic regurgitation (AR) is a condition associated with volume overload, causing left-ventricular (LV) remodeling, eccentric LV hypertrophy and eventually heart failure. LV remodeling associated with AR is regulated by mechanical stress, neurohormonal activation, inflammation and oxidative stress. Since anti-oxidized low-density lipoprotein (LDL) antibodies (Abs) are a measurable marker of oxidative stress, we hypothesized that an increased level of circulating oxidized LDL (oxLDL) Abs may be related to remodeling of the left ventricle in patients with significant AR. Methods: We assessed IgG anti-oxLDL Abs in 31 patients with significant AR and compared them to 30 patients with similar risk factors and no valvular disease. Abs to oxLDL were determined by ELISA. Results: The 2 groups had similar clinical characteristics. There was no difference between patients with AR and patients with no AR in the level of anti-oxLDL Abs. However, in all patients and controls, anti-oxLDL Abs correlated positively with the diameter of the ascending aorta (AA; r = 0.32, p = 0.016) and the level of oxLDL Abs was significantly higher in patients with an AA diameter ≥39 mm. On multivariate analysis, only white blood cell count and AA diameter were related to anti-oxLDL Abs in all patients. Conclusions: We did not find a difference in the level of anti-oxLDL Abs between patients with AR and controls; however, there was a strong correlation between anti-oxLDL Abs and AA diameter. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(1):54-61.
  • Cardiology 02/2014; 128(1):41-42.
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    ABSTRACT: Objectives: Bradycardia is caused by loss-of-function mutations in potassium channels that regulate phase 3 repolarization of the cardiac action potential. The purpose of this study is to monitor the effects of potassium channel (KCNQ1) inhibition and to evaluate the effects of isoproterenol (ISO) and MgSO4 in restoring sinus rhythm in atrial cells. Methods: Microelectrode array was used to analyze conduction velocity, voltage amplitude and cycle length of atrial cells (HL-1). A combination of ISO and MgSO4 was used to restore sinus rhythm in these cells. Results: mRNA expression levels of KCNQ1 (42.2 vs. 100%, p < 0.0001), connexin 43 (29.6 vs. 100%, p = 0.0033), atrial natriuretic peptide (31.0 vs. 100%, p = 0.0030), cardiac actin (38.2 vs. 100%, p < 0.0001) and α-myosin heavy chain (31.2 vs. 100%, p = 0.00254) were significantly lower in the KCNQ1 gene-inhibited group compared to the control group. When treated with MgSO4 (1 mM) and ISO (10 μM), conduction velocity (0.0208 ± 0.0036 vs. 0.0086 ± 0.0014 m/s, p = 0.0004) and voltage amplitude (1,210.78 ± 65.81 vs. 124.1 ± 13.30 μV, p < 0.0001) were higher, and cycle length (431.55 ± 2.05 vs. 1,015.15 ± 4.31 ms, p < 0.0001) was shorter than in the gene-inhibited group. Conclusion: Inhibition of sinus rhythm in the bradycardia cell model was recovered by treatment with ISO and MgSO4, demonstrating the potency of combination therapy in the treatment of bradycardia. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(1):15-24.
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    ABSTRACT: Objective: This study aims to assess the characteristics of neointimal hyperplasia after drug-eluting stent (DES) implantation in patients with diabetes mellitus (DM) by optical coherence tomography (OCT). Methods: OCT was performed in 109 patients (45 with DM and 64 without DM) 1 year after DES implantation. Neointimal coverage and thickness on the luminal side were measured. The characteristics of neointimal hyperplasia were classified into three patterns, namely, high signal pattern, low signal pattern and layered signal pattern, according to the neointimal signal intensity. The development of in-stent neoatherosclerosis was also examined. In the DM group, glycated hemoglobin (HbA1c) levels were analyzed in order to assess their contribution to neointimal characteristics. Results: OCT results indicated that neointimal thickness was thicker in the DM group than in the non-DM group (177.19 ± 165.36 vs. 166.76 ± 132.38 μm, p < 0.001). Lower incidence of high signal pattern (58.33 vs. 75.34%, p = 0.037) and higher incidence of in-stent neoatherosclerosis (18.33 vs. 5.48%, p = 0.027) were observed in the DM group. In the DM subgroup with HbA1c >7%, significantly higher incidence of low signal pattern (37.50 vs. 21.43%, p = 0.001) and layered signal pattern (18.75 vs. 3.57%, p = 0.001) and lower incidence of high signal pattern were observed (43.75 vs. 75.0%, p < 0.001). In-stent neoatherosclerosis was also frequently detected in the high HbA1c group compared with the low HbA1c group (28.13 vs. 7.14%, p = 0.048). Conclusion: Neointimal characteristics differed between DM and non-DM patients. HbA1c levels in DM patients contributed to the development of neointimal hyperplasia and in-stent neoatherosclerosis. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(1):34-40.
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    ABSTRACT: Objectives: Increased plasma thrombogenesis and blood platelet reactivity are associated with a worse outcome in patients with the acute coronary syndrome (ACS). The aim of this study was to test the clinical utility of combining a thrombin generation test and platelet aggregation in predicting future ischemic events after ACS. Methods: The study included patients hospitalized due to ST-elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention with stent implantation. Blood for platelet aggregation and thrombin generation was collected at hospital discharge. We performed whole-blood platelet aggregation with arachidonic acid (AA), collagen, adenosine diphosphate and thrombin receptor-activating peptide (TRAP) as agonists and the thrombin generation test using a fluorescence method. Patients were followed for up to 6 months. The combined end point of the study consisted of death, stroke, myocardial infarction or repeated target vessel revascularization. Results: The study enrolled 161 patients. The end point occurred in 30 patients (18.6%). Thrombin generation showed a significantly prolonged lag time, time to thrombogram peak and start of the tail of the thrombogram in diabetic patients who reached the study end point but not in nondiabetics. End point occurrence was not connected with platelet reactivity at hospital discharge in the whole group. In the diabetic subgroup, increased platelet aggregation induced with AA and TRAP at hospital discharge was connected with a more frequent occurrence of the study end point. Conclusions: In diabetic patients after STEMI, thrombin generation measures as well as TRAP- and AA-induced platelet aggregation at hospital discharge are associated with an ensuing ischemic event during the 6-month follow-up. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(1):25-33.
  • Cardiology 02/2014; 128(1):13-14.
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    ABSTRACT: Objectives: To investigate the effects of allitridin on human ether-à-go-go-related gene (hERG) channels. Methods: We used whole-cell patch clamping and laser confocal scanning microscopy to evaluate the effects of allitridin on hERG currents and the membrane expression of the hERG protein expressed in HEK 293 cells. Results: The amplitude of IKr showed a concentration-dependent decrease with increasing allitridin concentration. Additionally, alterations in the gating properties of hERG channels were also confirmed. Allitridin does not alter the voltage- and time-dependent activation of hERG channels, the gating properties of hERG channel inactivation over time or the recovery from inactivation, but allitridin does cause alterations in the steady-state inactivation and the deactivation of hERG channels. We further evaluated the influence of allitridin on membrane expression of the hERG protein. Images of allitridin-treated cells showed a reduction in hERG protein on the membrane and retention in the cytoplasm. Conclusions: To the best of our knowledge this is the first study to show that allitridin reduces the IKr current by impairing the trafficking of hERG channels. The results may demonstrate that allitridin could be a promising candidate for the prevention and treatment of arrhythmia-related diseases. © 2014 S. Karger AG, Basel.
    Cardiology 02/2014; 128(1):1-8.
  • Cardiology 01/2014; 127(4):265-274.
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    ABSTRACT: Objective: We aimed to assess the ideal cut-off value of minimal lumen area (MLA) by intravascular ultrasound (IVUS) and its diagnostic performance to predict ischemia, using a large-scale, pooled analysis. Methods: Eleven centers worldwide were invited to provide their clinical, IVUS and fractional flow reserve (FFR) data. A total of 881 lesions were enrolled. Results: Angiographic % diameter stenosis (r = -0.373, p < 0.0001) and IVUS MLA (r = 0.289, p < 0.0001) correlated with FFR. Best cut-off value (BCV) of IVUS MLA to define the functional significance (FFR <0.8) was 2.75 mm(2) (AUC 0.646, 95% CI 0.609-0.684). When the diagnostic performance of IVUS MLA was tested according to the lesion location, BCV could be found only in lesions in the proximal artery and the mid-left anterior descending artery. Interestingly, Asians (n = 623) and Westerners (n = 258) showed different demographic and lesion characteristics as well as different BCVs to define ischemia. The BCV for the proximal/mid-left anterior descending artery lesions was 2.75 mm(2) (AUC 0.688, 95% CI 0.635-0.742) in Asians and 3.0 mm(2) (AUC 0.695, 95% CI 0.605-0.786) in Westerners. Conclusion: In this pooled analysis, an IVUS MLA of 2.75 mm(2) was the BCV to define the functional significance of intermediate coronary stenosis. However, when IVUS MLA is used to determine the functional significance, both the lesion and patient characteristics should be considered. © 2014 S. Karger AG, Basel.
    Cardiology 01/2014; 127(4):256-262.
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    ABSTRACT: Objectives: The objective of this study was to determine the effect of inhibiting malonyl-CoA decarboxylase (MCD) on cardiac remodeling following myocardial infarction (MI) in rats. We used an ultrasound (US)-mediated microbubble (MB) approach for targeted delivery of a microRNA (miRNA) interference plasmid to the myocardium to silence MCD expression. Methods: Five pairs of RNA interference sequences were screened and ranked according to their highest inhibition rates in HEK293 cells. The plasmid with the highest inhibition rate was transfected by US into the rat myocardium after mixing with lipid MB. Twelve and 16 weeks after MI, cardiac function was measured by echocardiography, and glucose transporter-4 (GLUT-4) and high-energy phosphate levels were monitored in the myocardium before and after transfection. Results: Ejection fraction (EF) decreased by 16% in the control MI group, while it decreased by 8% in the MCD inhibition group that utilized the US-mediated MB approach. Concomitant with the improved EF, high-energy phosphates were increased and lactic acid was decreased in the left ventricle (LV), with no changes in triglyceride or GLUT-4 levels. Conclusions: Inhibiting MCD by an US-mediated injection of miRNA into the rat myocardium increased energy reserves in the LV after MI, most likely by limiting lactic acidosis and improving cardiac function without increasing lipid toxicity. © 2014 S. Karger AG, Basel.
    Cardiology 01/2014; 127(4):236-244.
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    ABSTRACT: Objective: This paper aimed to investigate the molecular mechanisms associated with angiotensin-converting enzyme (ACE)-inhibitory peptide activity involved in vascular extracellular matrix (ECM) remodeling. Therefore, changes in collagen fibers, elastic fibers and laminin were assessed in the left common carotid artery (LCCA). Methods: We selected 10-week-old male spontaneously hypertensive rats to study the expression levels of matrix metalloproteinases (MMPs), transforming growth factor, angiotensin (Ang) II and nuclear factor (NF)-p65 in the wall of carotid arteries. Results: Compared to the control group, laminin expression was significantly increased (p < 0.05) in the vascular endothelium of the LAP (a homemade ACE-inhibitory peptide, named by ourselves) group, whereas the percentage of elastic/collagen fibers in the LCCA vascular area was significantly decreased (p < 0.0001) in the LAP group. Immune blots of MMP-2, MMP-9, NF-p65 and AngII were significantly reduced in the LCCA wall in the LAP group. Conclusion: Vascular ECM remodeling may be related to the inhibitory action of LAP on ECM deposition. © 2014 S. Karger AG, Basel.
    Cardiology 01/2014; 127(4):247-255.
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    ABSTRACT: Objective: Transcatheter aortic valve implantation (TAVI) is occasionally associated with stroke and silent cerebral ischemia, which may affect cognitive and functional performance. The aim of this study was to evaluate the changes in cognitive performance and functional status following TAVI. Methods: We performed a comprehensive prospective functional, cognitive and quality of life (QOL) evaluation in consecutive patients who underwent TAVI using the CoreValve device (Medtronic Inc.). The evaluation was performed at baseline and 1 month after the procedure and included the 36-item Short-Form Health Survey for QOL assessment, Mini-Mental State Examination (MMSE), quantitative clock drawing test (Rouleau), color trails test, Cognistat evaluation, Barthel Index and Duke Activity Status Index. Results: A total of 36 patients completed the full pre- and post-TAVI evaluation. Mean age was 82.2 ± 4.2 years (52.8% men); 94.5% of patients had low functional class (New York Heart Association III/IV), and 13.9% had prior stroke. After the procedure, all patients had improved functional status and valve hemodynamics. At 1 month, there was a significant improvement in the MMSE and Cognistat evaluations (from 25.9 ± 3.3 to 27.6 ± 2.4, p < 0.001, and from 5 ± 1 to 5.7 ± 0.7, p = 0.001, respectively). Conclusions: Our preliminary results of a comprehensive assessment of patients undergoing TAVI indicate favorable results for both functional performance and cognitive function early after the procedure. © 2014 S. Karger AG, Basel.
    Cardiology 01/2014; 127(4):227-235.

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