Alper Ucak

Gulhane Military Medical Academy, Engüri, Ankara, Turkey

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Publications (79)72.78 Total impact


  • No preview · Article · Jun 2015 · European Heart Journal Cardiovascular Imaging
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    ABSTRACT: Post-traumatic pseudo-aneurysm is a rare complication of penetrating vascular injury. Endovascular stent implantation has become an alternative approach in the management of this pathology. In our case, we present a brachial artery pseudo-aneurysm that was treated with endovascular stent implantation, and removal of a broken catheter part with a three-dimensional snare device.
    No preview · Article · Apr 2015
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    ABSTRACT: Acute mesenteric ischemia (AMI) is a rapidly progressive disease where early diagnosis is life--saving. In our study, we obtained changes of visfatin levels in the serum, peritoneal and intestinal lavage samples in rats, to investigate the effectiveness of these changes in the early diagnosis of AMI METHODS: In Group 1 (Sham group) the intestine was pulled out and allowed to stand for 3 hours without ischemia. In group 2 (acute mesenteric ischemia--repercussion group) the mesenteric artery was ligated and, mesenteric blood flow was restored after 60 min ischemia. In Group 3 (acute pancreatitis group) the ductus pancreatic us was ligated, and the abdomen was closed for 3 days in expectation of the formation of pancreatitis. In all of the groups, the intestinal lavage, peritoneal lavage and blood samples were analyzed in 0, 60 and 180 minutes. Serum, intestinal and peritoneal lavage visfatin levels were found to be increased in Group 2 and Group 3 (P <0.05). In Group 2, while serum TNF--alpha levels were increased in both ischemia and reperfusion; in intestinal lavage sample the increase was only in the ischemic phase (P <0.05). In Group 2, IL--8 levels were significantly increased after ischemia in serum (p = 0.03) and after repercussion in intestinal lavage (p = 0.004) samples. Serum, intestinal and peritoneal visfatin levels were increased not only in the case of mesenteric ischemia, but also in acute pancreatitis. In the case of acute abdomen, the visfatin levels of the intestinal and peritoneal cavities may increase parallel to the serum visfatin levels.
    No preview · Article · Mar 2015 · International angiology: a journal of the International Union of Angiology
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    Full-text · Dataset · Nov 2014
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    ABSTRACT: SuMMAry: AiMS: Mitral valve treatment in valve endocarditis is currently a challenging issue. Repair is preferred to replacement but it often requires extensive debridement of vegetation and infected tissue as well as complex reconstruction in the active phase. MeTHODS: We report on a successful repair of the mitral valve, as described in the case of active endocarditis. reSuLTS: Postoperative echocardiography demonstrated no regurgitation at the newly formed mitral valve. CONCLuSiON: First preference is pericardial repair, a technically diffi cult procedure but with satisfactory results in mitral repair for active endocarditis. Reconstruction of the mitral commissure with this technique not only supports the opening of the commissural area but also helps regain the physiological motion of the mitral valve.
    Full-text · Article · Sep 2014

  • No preview · Article · May 2014 · The Journal of thoracic and cardiovascular surgery

  • No preview · Article · Apr 2014 · The Journal of thoracic and cardiovascular surgery
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    Alper Uçak

    Preview · Article · Jan 2014 · Turkish Journal of Thoracic and Cardiovascular Surgery
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    Alper Uçak

    Preview · Article · Jan 2014 · Turkish Journal of Thoracic and Cardiovascular Surgery
  • M. Uǧur · V. Temizkan · A. Uçak · A.T. Yilmaz
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    ABSTRACT: The distance between coronary ostium and prosthetic valve annular ring decrease in supraannular valve replacement. Coronary osteal stenosis may develop due to thrombosis in early and late terms after supraannular valve replacement or coronary osteal dislocation inferiorly in aortic valve replacement. One of the factors affecting the development of coronary osteal thrombosis is foreign body reaction due to sutures in coronary ostium. In case of cutting the sutures short to prevent the foreign body reaction, but paravalvular leak may develop due to dissolving of the knot. We are reporting an alternative knot technique we have applied in supraannular aortic valve replacement.
    No preview · Article · Nov 2013 · Turkiye Klinikleri Cardiovascular Sciences
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    ABSTRACT: Acute occlusion is a rare complication of carotid stent implantation. A 74-year-old female patient became unconscious presenting with impaired neurological status and dysarthria within the first hour of carotid artery stent implantation. The patient underwent emergent surgery with the diagnosis of acute stent occlusion in Doppler ultrasonography and angiography. Occluded stent was removed and carotid endarterectomy surgery was performed. The patient was extubated without any complication in the postoperative third hour and discharged after a four-day uneventful hospital stay.
    No preview · Article · Oct 2013 · Turkish Journal of Thoracic and Cardiovascular Surgery
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    ABSTRACT: Background: Saphenous vein mapping provides accurate identification of the graft diameter, location of the harvest side, and quality of graft and also led to a selective leg skin incision. In this article, we aimed to compare patients who underwent coronary artery bypass graft (CABG) surgery with or without vein mapping. Methods: Patients who underwent CABG surgery with saphenous vein grafts (SVG) between January 2005 and January 2010 in our service were analyzed retrospectively. One hundred seventy-eight 178 SVGs were harvested with classical methods (Group A), and 136 SVGs were harvested after Doppler ultrasonography (USG) mapping (Group B). Results: In Group A, 6.7% of patients needed additional incisions for graft harvesting than planned before CABG surgery due to unsuitable vein grafts. In Group B, SVGs were harvested from left lower extremity in 16 patients, and the saphenous vein was not suitable for grafting in 1 patient due to Doppler examination. In the postoperative period, complications at the incision site were reduced in Group B. Conclusion: Preoperative vein mapping for harvesting SVGs is an effective method in reducing wound site complications, hospital stay, and hospital costs and in increasing patient comfort and satisfaction.
    No preview · Article · Oct 2013 · Heart Surgery Forum
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    ABSTRACT: OBJECTIVES Coarctation accompanied by cardiac lesions is a complex clinical situation due to the presence of two different pathologies that necessitate surgical treatment. An individual strategy, according to the severity of the disease, is important to reduce perioperative mortality and morbidity.METHODS We report here on 25 patients with coarctation accompanied by cardiac lesions who were treated by various surgical approaches. Coarctation and associated disease were treated in 14 patients in a single stage by an ascending-to-descending bypass (n = 11) or by a hybrid procedure (n = 3). The remaining 11 patients underwent a two-stage operation for their treatment. Six of these 11 patients who had coronary artery disease or signs of congestive heart failure were first operated for their cardiac disease, whereas in the remaining five patients, who did not have any congestive signs, coarctation repair was performed first.RESULTSAll the patients were male, between the ages of 20 and 24 years, except for one 45-year-old woman. The mean cross-clamp times, cardiopulmonary bypass times and operation times were 52 ± 14.5, 102.3 ± 28.5 and 174 ± 24.8 min in the extra-anatomical bypass group; 29.8 ± 11.7, 55.5 ± 17.6 and 116 ± 22 min in the two-stage groups and 49 ± 19.8, 63 ± 18.7 and 159 ± 21.3 min in the hybrid patients, respectively. One patient who underwent extra-anatomical bypass died on the 14th postoperative day. There were no events during the follow-up period for the other patients. Also, there were no gradients between the extremities and no graft-related complications.CONCLUSIONS As a consequence of the progress in the development of endovascular techniques, hybrid treatment is becoming a more popular option for the treatment of coarctation accompanied by cardiac diseases. Two-stage procedures and extra-anatomical bypass might be alternative techniques if endovascular procedures are contraindicated or failing.
    Full-text · Article · Jun 2013 · Interactive Cardiovascular and Thoracic Surgery
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    ABSTRACT: Background: Anomalous pulmonary venous drainage commonly accompanies sinus venosus atrial septal defects (SVASDs). Many techniques have been reported for avoiding postoperative complications, such as narrowing of the superior vena cava (SVC) or the pulmonary system, and arrhythmia. We perform a single V-Y pericardial patch plasty repair technique for SVASDs. The purpose of this study is to report on the long-term results of this surgical technique. Methods: We retrospectively analyzed patients who had a diagnosis of ASD and who underwent their operations between 2000 and 2010 at the Gulhane Military Medical Academy Haydarpasa Training Hospital. Thirty-nine of the patients had an anomalous pulmonary return, and the single pericardial patch technique had been performed in 32 of these patients. Results: The mean (±SD) postoperative extubation time was 5 ± 1.6 hours. The mean drainage volume was 384 ± 137 mL. All patients were discharged from the hospital at a mean of 4.6 ± 1.1 days after their operation and were prescribed anticoagulants for 3 months. No perioperative or late-term mortality was observed. Patients were followed up for 6 months to 2 years. There were no residual shunts and no stenosis-related findings in the pulmonary venous system or the SVC. Conclusion: Use of the single pericardial patch plasty technique might lower complication rates in patients with SVASD, especially those who have not completed their growth.
    No preview · Article · Apr 2013 · Heart Surgery Forum
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    ABSTRACT: Atherosclerosis might affect all arterial segments of the vascular system, thus peripheral arterial disease (PAD) accompanying coronary artery disease (CAD) is not uncommon. In addition to this coexistence, abdominal aortic aneurysm (AAA) is frequently associated with CAD. Although treatment strategies of CAD and PAD or CAD and AAA has been reported previously, treatment of these three pathologies has not been reported. The management of a therapeutic strategy is important for avoiding perioperative mortality and morbidity in CAD associated with AAA and PAD. We are reporting our simultaneous treatment strategy of three pathologies with endovascular AAA repair, stent implantation into the superficial femoral artery (SFA) and coronary artery bypass grafting (CABG).
    No preview · Article · Mar 2013
  • G. Arslan · I. Alp · M. Ugur · A. Ucak · A.T. Yilmaz

    No preview · Article · Mar 2013
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    ABSTRACT: Background: In this study, cardiac surgery with minimally invasive reversed C sternotomy was compared with conventional sternotomy in patients undergoing valve replacement or septal defect repair. Methods: In this prospective randomized study, 35 patients were assigned into one of two groups for elective cardiac surgery under general anesthesia: Group A (reversed C sternotomy group) and Group B (conventional sternotomy group). Intraoperative variables, intubation time, postoperative drainage volume, pulmonary function tests, sleep quality and quality of life, and requirement for blood transfusion were compared. Results: A significant difference between the two groups was found in blood transfusion requirement, extubation time, and drainage volume. Forced expiratory volume in one second and functional vital capacity were significantly lower in Group B than in Group A at postoperative Month 1. Total sleep component score of Pittsburg Sleep Quality Index in Group B patients was significantly worse at postoperative Month 1. Postoperative assessment of quality of life (physical and mental) also showed a significant difference between the two groups. Conclusion: These preliminary findings suggest that creating an access point without compromising the integrity of the sternum seems to be an advantageous and appropriate technique for suitable patients undergoing cardiac surgery.
    Full-text · Article · Jan 2013 · The Thoracic and Cardiovascular Surgeon
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    ABSTRACT: Background: In this study, we reported mid-term results of early endovascular treatment modalities for traumatic vascular injuries confirmed by angiography. Methods: Between January 2 007 and December 2010, patients who were admitted to our clinic with gunshot injury or suspected penetrating/blunt injuries and suspected vascular injury were examined. After angiographic examination, 10 patients underwent endovascular treatment due to vascular injury. Vascular injuries were due to penetrating injury in three patients, gunshot injury in six patients and blunt trauma in one patient. Six patients presented with a pseudoaneurysm (two of which associated with arteriovenous fistula), three with rupture and one with axillary artery-to-bronchial fistula. Results: Coil embolization was performed in patients with arterial rupture. Stent graft implantation was performed in patients with pseudoaneurysm formation, arteriovenous or artery-to-bronchial fistula. All procedures were performed under local anesthesia. Symptoms related to vascular injury disappeared within postoperative three days and they were discharged on the postoperative fifth day. All patients were re-examined by color Doppler ultrasonography at three and 12 months. No findings of related extravasation, stenosis or ischemia were detected in the follow-up. Conclusion: Unnoticed vascular, traumatic or gunshot injuries may lead to limb dysfunction in the long-term. Angiographic evaluation of the vascular injury in suspected patients allows early treatment of vascular injuries. Endovascular treatment of vascular injuries in the same procedure is associated with less blood transfusion, shorter intensive care and in-hospital stay and lower mortality in patients with angiographically vascular injury.
    No preview · Article · Jan 2013 · Turkish Journal of Thoracic and Cardiovascular Surgery

  • No preview · Article · Jan 2013
  • A Ucak · B Onan · A T Yilmaz
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    ABSTRACT: Hemangioma is a benign vascular malformation and generally diagnosed in childhood. This pathology frequently shows regression within the first decade of life, but it rarely presents in young adults beyond 12 years of age. When progressive growth of the tumour leads to a giant hemangioma with clinical symptoms, surgical resection can be reasonable despite its high risk of complications such as intractable bleeding or recurrence. Selective angiography for assessment of the blood supply to hemangiomas is a guide for the surgeon to remove the lesion safely. We present the case of a 20-year-old patient, who underwent successful surgical treatment for a giant hemangioma that showed progressive enlargement in the abdominal wall.
    No preview · Article · Jul 2012 · Acta chirurgica Belgica

Publication Stats

147 Citations
72.78 Total Impact Points

Institutions

  • 2008-2015
    • Gulhane Military Medical Academy
      • Department of Cardiovascular Surgery
      Engüri, Ankara, Turkey
  • 2004-2014
    • GATA Haydarpaşa Training Hospital
      İstanbul, Istanbul, Turkey
  • 2013
    • İstanbul Eğitim ve Araştırma Hastanesi
      Cebelibereket, Osmaniye, Turkey
  • 2008-2012
    • Istanbul Surgery Hospital
      İstanbul, Istanbul, Turkey
  • 2006-2011
    • Ahi Evren Göğüs Kalp Damar Cerrahisi Eğitim ve Araştırma Hastanesi
      Atrabazandah, Trabzon, Turkey
    • Haydarpasa Numune Research and Teaching Hospital
      İstanbul, Istanbul, Turkey