Person: AK, KORAY
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AK
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KORAY
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Publication Metadata only Direct transaortic transcatheter aortic valve implantation(BAYCINAR MEDICAL PUBL-BAYCINAR TIBBI YAYINCILIK, 2014) KARARMAZ, ALPER; Isbir, Selim; Birkan, Yasar; Ak, Koray; Elci, Emre; Kararmaz, AlperTranscatheter aortic valve implantation (TAVI), has emerged as a new treatment option in patients with severe aortic stenosis who are considered to be high-risk for conventional surgery. In recent years, TAVI has been widely used in Turkey as in all the world. Transaortic approach for TAVI is a new approach in patients with poor peripheral vessels. In this article, we report a 82-year-old female case with severe aortic stenosis and coronary artery disease presenting with several comorbidities who was treated with direct transaortic TAVI and off-pump coronary artery bypass grafting for the first time in Turkey.Publication Metadata only Transatrial balloon atrial septostomy to facilitate weaning off venoarterial ECMO after pulmonary endarterectomy(2022-10-01) AK, KORAY; TİRE, YAKUP; KARARMAZ, ALPER; YILDIZELİ, BEDRETTİN; AK K., Arslanhan G., TİRE Y., Tosun S., KARARMAZ A., HANTA İ., YILDIZELİ B.Atrial septostomy has been the last resort in the management of patients with the right ventricular failure related to pulmonary hypertension before lung transplantation. In this paper, we present a simple and safe technique (transatrial approach) for balloon atrial septostomy in a patient who required central venoarterial extracorporeal membrane oxygenation after pulmonary endarterectomy.Publication Metadata only Comparison of bretschneider HTK and blood cardioplegia (4:1): A prospective randomized study(2023-01-01) AK, KORAY; KARARMAZ, ALPER; ARSAN, SİNAN; AK K., Dericioǧlu O., Midi A., KARARMAZ A., ER Z. C., Doǧusan Z., ARSAN S.Background We compared the effect of intermittent blood and histidine-tryptophan-ketoglutarate (HTK) solution of Bretschneider on myocardial histopathology and perioperative outcome. Methods Forty adult cardiac surgery patients were grouped into two (n = 20 for each): (1) Intermittent blood cardioplegia (IBC): had repeated cold 4:1 blood cardioplegia and (2) HTK: had a single dose of cold HTK for cardioprotection. Creatine kinase (CK)-MB, Troponin-I (cTn-I), pH, and lactate were studied in coronary sinus blood before and after aortic cross-clamping (AXC) and systemic blood at postoperative 6th, 24th, and 48thhours. Myocardial biopsy was performed before and after AXC for light microscopy. Vacuolation, inflammation, edema, and glycogen were graded semiquantitatively (from 0 to 3). The myocardial apoptotic index was evaluated via the terminal deoxynucleotidyl transferase dUTP nick end labeling. Results There were no differences in perioperative clinical outcomes between the groups. The coronary sinus samples after AXC were more acidotic (7.15 ± 0.14 vs. 7.32 ± 0.07, p = 0.001) and revealed higher CK-MB (21.0 ± 12.81 vs. 12.60 ± 11.80, p = 0.008) in HTK compared with IBC. The HTK had significantly a higher amount of erythrocyte suspension intraoperatively compared with IBC (0.21 ± 0.53 vs. 1.68 ± 0.93 U, p = 0.001). Microscopically, myocardial edema was more pronounced in HTK compared with IBC after AXC (2.25 ± 0.91 vs. 1.50 ± 0.04, p = 0.013). While a significant increase in the apoptotic index was seen after AXC in both groups (p = 0.001), no difference was detected between the groups (p = 0.417). Conclusion IBC and HTK have a similar clinical outcome and protective effect, except for more pronounced myocardial edema and increased need for intraoperative transfusion with HTK.Publication Metadata only Direct Transapical Implantation of an Endocardial Pacing Lead to the Left Ventricle: An Alternate Pacing Site After Tricuspid Valve Replacement(WILEY-BLACKWELL, 2014) ÇİNÇİN, AHMET ALTUĞ; Ak, Koray; Isbir, Selim; Cincin, Altug; Kararmaz, Alper; Arsan, SinanIn this paper, we report an alternative approach for implantation of ventricular pacing lead for complete atrioventricular block after tricuspid valve replacement. doi: 10.1111/jocs.12288 (J Card Surg 2014;29:290-292)