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Karataş MB, Durmuş G, Zengin A, Gökalp M, Hayıroğlu Mİ, Çınar T, Gürkan K, Çam N. Association of Uric Acid Albumin Ratio with Recurrence of Atrial Fibrillation after Cryoballoon Catheter Ablation. Medicina (Kaunas) 2022; 58:medicina58121872. [PMID: 36557074 PMCID: PMC9784806 DOI: 10.3390/medicina58121872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/11/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
Objective: Despite improvements in the technology of catheter ablation of atrial fibrillation (AF), recurrences are still a major problem, even after a successful procedure. The uric acid/albumin ratio (UAR), which is an inexpensive and simple laboratory parameter, has recently been introduced in the literature as a predictor of adverse cardiovascular events. Hence, we aimed to investigate the relationship between the UAR and AF recurrence after catheter ablation. Methods: A total of 170 patients who underwent successful catheter ablation for AF were included. The primary outcome was the late recurrence after treatment. The recurrence (+) and recurrence (−) groups were compared for clinical, laboratory and procedural characteristics as well as the predictors of recurrence assessed by regression analysis. Results: In our study population, 53 (26%) patients developed AF recurrence after catheter ablation. Mean UAR was higher in the recurrence (+) group compared to recurrence (−) group (2.4 ± 0.9 vs. 1.8 ± 0.7, p < 0.01). In multivariable regression analysis, left atrial diameter (HR: 1.08, 95% CI: 1.01−1.16, p = 0.01) and UAR (HR:1.36, 95% CI: 1.06−1.75, p = 0.01) were found to be independent predictors of recurrence. In ROC analysis, the UAR > 1.67 predicted recurrence with a sensitivity of 77% and a specificity of 57% (AUC 0.68, p < 0.01). Conclusion: For the first time in the literature, the UAR were found to be correlated independently with AF recurrence after catheter ablation.
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Affiliation(s)
- Mehmet Baran Karataş
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
- Correspondence: ; Tel.: +90-216-5458695; Fax: +90-216-4592766
| | - Gündüz Durmuş
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
| | - Ahmet Zengin
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
| | - Murat Gökalp
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
| | - Mert İlker Hayıroğlu
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
| | - Tufan Çınar
- Department of Cardiology, Health Sciences University, Sultan Abdulhamid Han Training and Research Hospital, 34668 Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
| | - Neşe Çam
- Department of Cardiology, Health Sciences University, Siyami Ersek Cardiovascular and Thoracic Surgery Center, 34668 Istanbul, Turkey
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Çinier G, Hayıroğlu Mİ, Özcan KS, Pay L, Tekkeşin Aİ, Gürkan K. The use of ivabradine in a patient with idiopathic ventricular arrhythmia originating from the left ventricular summit. J Electrocardiol 2022; 71:32-36. [PMID: 35026679 DOI: 10.1016/j.jelectrocard.2021.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/19/2021] [Accepted: 12/29/2021] [Indexed: 10/19/2022]
Abstract
Idiopathic ventricular arrhythmias (VA) are common and treatment options include anti-arrhythmic drugs (AAD) or catheter ablation. Patients presenting with idiopathic VA which is originating from the left ventricular summit (LVS) poses a particular challenge as the success for catheter ablation is low and AAD's may not be used long-term due to side effects. Ivabradine is an inhibitor of funny current (If) in cardiac pacemaker cells by blocking hyperpolarization-activated cyclic nucleotide-gated (HCN). In the present case, we reported the use of ivabradine in treatment of idiopathic VA which was originated from LVS and was resistant to multiple AAD's and catheter ablation.
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Affiliation(s)
- Göksel Çinier
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital, Istanbul, Turkey
| | - Mert İlker Hayıroğlu
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital, Istanbul, Turkey
| | - Kazım Serhan Özcan
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital, Istanbul, Turkey
| | - Levent Pay
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital, Istanbul, Turkey.
| | - Ahmet İlker Tekkeşin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital, Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training Hospital, Istanbul, Turkey
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Çinier G, Hayıroğlu Mİ, Çınar T, Pay L, Yumurtaş AÇ, Tezen O, Eren S, Kolak Z, Çetin T, Özcan S, Türkkan C, Özbilgin N, Tekkeşin Aİ, Alper AT, Gürkan K. Predictors for Early Mortality in Patients with Implantable Cardiac Defibrillator for Heart Failure with Reduced Ejection Fraction. Indian Heart J 2022; 74:127-130. [PMID: 35104458 PMCID: PMC9039682 DOI: 10.1016/j.ihj.2022.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 01/08/2022] [Accepted: 01/26/2022] [Indexed: 11/25/2022] Open
Abstract
Implantable cardioverter defibrillators (ICD) are recommended in heart failure with reduced ejection fraction (HFrEF) patients to reduce arrhythmic deaths. This study aimed to identify risk factors associated with mortality within one-year following the ICD. The data from our hospital's electronic database system was extracted for patients who were implanted ICD secondary to HFrEF between 2009 and 2019. Overall, 1107 patients were included in the present analysis. Mortality rate at one-year following the device implantation was 4.7%. In multivariate analysis; age, atrial fibrillation, New York Heart Association classification >2, blood urea nitrogen, pro-brain natriuretic peptide and albumin independently predicted one year mortality.
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Çinier G, Hayıroğlu Mİ, Kolak Z, Tezen O, Yumurtaş AÇ, Pay L, Eren S, Çetin T, Özcan S, Türkkan C, Özbilgin N, Tekkeşin Aİ, Alper AT, Gürkan K. The value of C-reactive protein-to-albumin ratio in predicting long-term mortality among HFrEF patients with implantable cardiac defibrillators. Eur J Clin Invest 2021; 51:e13550. [PMID: 33778950 DOI: 10.1111/eci.13550] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/31/2021] [Accepted: 02/21/2021] [Indexed: 01/05/2023]
Abstract
BACKGROUND Patients with heart failure with reduced ejection fraction (HFrEF) who received implantable cardiac defibrillator (ICD) still remain at high risk due to pump failure and prevalent comorbid conditions. The primary aim of this research was to evaluate the predictive value of C-reactive protein-to-albumin ratio (CAR) for all-cause mortality among patients with HFrEF despite ICD implantation. MATERIALS AND METHODS Those who were implanted ICD for HFrEF in our institution between 2009 and 2019 were included. Data were extracted from hospital's database. CAR was calculated as ratio of C-reactive protein (CRP) to serum albumin concentration. Patients were grouped into tertiles in accordance with CAR at the time of the implantation. During follow-up duration of 38 [17-77] months, survival times of tertiles were compared by using Kaplan-Meier survival method. Forward Cox proportional regression model was used for multivariable analysis. RESULTS Thousand and eleven patients constituted the study population. Ischaemic cardiomyopathy was the primary diagnosis in 92.3%, and ICD was implanted for the primary prevention among 33.9% of patients. Of those, 14.5% died after the discharge. Patients in tertile 3 (T3) had higher risk of mortality (4.2% vs 11.0% vs 28.5%) compared with those in other tertiles. Multivariable analysis revealed that when patients in T1 were considered as the reference, both those in T2 and those in T3 had independently higher risk of all-cause mortality. This finding was consistent in the unadjusted and adjusted multivariable models. CONCLUSION Among patients with HFrEF and ICD, elevated CAR increased the risk of all-cause mortality at long term.
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Affiliation(s)
- Göksel Çinier
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Mert İlker Hayıroğlu
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Zeynep Kolak
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ozan Tezen
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ahmet Çağdaş Yumurtaş
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Levent Pay
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Semih Eren
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Tuğba Çetin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Serhan Özcan
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ceyhan Türkkan
- Department of Cardiology, Okan University Hospital, Istanbul, Turkey
| | - Nazmiye Özbilgin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ahmet İlker Tekkeşin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ahmet Taha Alper
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
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Çinier G, Hayıroğlu Mİ, Pay L, Yumurtaş AÇ, Tezen O, Eren S, Kolak Z, Çetin T, Özcan S, Türkkan C, Özbilgin N, Tekkeşin Aİ, Alper AT, Gürkan K. Prognostic nutritional index as the predictor of long-term mortality among HFrEF patients with ICD. Pacing Clin Electrophysiol 2021; 44:490-496. [PMID: 33438766 DOI: 10.1111/pace.14170] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 12/29/2020] [Accepted: 01/10/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The benefit of implantable cardiac defibrillator (ICD) in patients with heart failure and reduced ejection fraction (HFrEF) could be limited in a particular group of patients. Low prognostic nutritional index (PNI) indicates malnutrition and proinflammatory condition. We sought to investigate the value of PNI in predicting long-term mortality among HFrEF patients with ICD. METHODS Electronic database was searched for identifying patients with HFrEF who were implanted ICD in our institution between 2009 and 2019. Demographic and clinical characteristics of included patients were recorded. PNI was calculated according to the formula: 10 × serum albumin (g/dL) + 0.005 × total lymphocyte count (per mm3 ). Patients were divided into the quartiles according to PNI values. Differences between the groups were analyzed by the log-rank test. A forward Cox proportional regression model was used for multivariable analysis. RESULTS One thousand and hundred patients were included to the study. The underlying heart failure etiology was ischemic and nonischemic in 77.3% and 22.7% of patients, respectively. Mortality rate in Q1 (5.1%) was considered as the reference. In the unadjusted model the mortality rate was 9.5% (hazard ratio [HR] 1.76, 95% confidence interval [95% CI] [0.92-3.38]) in Q2, 10.2% (HR 1.88, 95% CI 0.99-3.58) in Q3, and 39.6% (HR 8.12, 95% CI 4.65-14.17) in Q4. The same trend was consistent in the age- and sex-adjusted, comorbidities-adjusted, and covariates-adjusted models. CONCLUSION Among patients who were implanted with ICD secondary to HFrEF, lower PNI value predicted all-cause mortality during long-term follow-up. This is the first study demonstrating the value of PNI in this population.
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Affiliation(s)
- Göksel Çinier
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Mert İlker Hayıroğlu
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Levent Pay
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ahmet Çağdaş Yumurtaş
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ozan Tezen
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Semih Eren
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Zeynep Kolak
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Tuğba Çetin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Serhan Özcan
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ceyhan Türkkan
- Department of Cardiology, Okan University Hospital, Istanbul, Turkey
| | - Nazmiye Özbilgin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ahmet İlker Tekkeşin
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Ahmet Taha Alper
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
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Tekkeşin Aİ, Hayıroğlu Mİ, Çinier G, Özdemir YS, İnan D, Yüksel G, Pay L, Parsova KE, Vatanoğlu EG, Şeker M, Durak F, Gürkan K. Lifestyle intervention using mobile technology and smart devices in patients with high cardiovascular risk: A pragmatic randomised clinical trial. Atherosclerosis 2021; 319:21-27. [PMID: 33465658 DOI: 10.1016/j.atherosclerosis.2020.12.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/19/2020] [Accepted: 12/18/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND AND AIMS Mobile technology-based solutions present promising effects against cardiovascular diseases. Long-term follow-up in mobile phone-based interventions has not yet been elucidated as a primary prevention technique for cardiovascular diseases. The objective of the present trial is to evaluate the effectiveness of lifestyle intervention on the change in the atherosclerotic cardiovascular disease (ASCVD) risk score in a 1-year follow-up using smart phone technology in patients with high cardiovascular risk. METHODS This prospective, randomised, single-centre clinical investigation enrolled 242 and 241 patients to the intervention plus usual care and usual care arms, respectively. The primary outcome of this study was the 1-year ASCVD risk score adjusted to baseline ASCVD risk score. ASCVD risk scores were calculated for every study participant at the randomisation and final stages. RESULTS After a 1-year follow-up, the intervention plus usual care reduced the ASCVD score by 2.7% (adjusted treatment effect -2.7, 95% confidence interval (CI): -2.2,-3.3, p<0.0001). An improvement was observed in favour of the intervention plus usual care arm in the majority of the pre-specified secondary endpoints. The high sensitive troponin and high sensitive C-reactive protein levels at 1 year were similar between the two arms. The treatment effect was homogenous for diabetes mellitus, gender, systolic blood pressure, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, triglycerides and body mass index; however, heterogeneity in the treatment effect was observed for age. CONCLUSIONS The lifestyle intervention using smart phone technology compared to usual care alone in patients with high cardiovascular risk reduced the ASCVD score at 1-year follow-up.
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Affiliation(s)
- Ahmet İlker Tekkeşin
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey.
| | - Mert İlker Hayıroğlu
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Göksel Çinier
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Yelda Soluk Özdemir
- Department of Physical Medication and Rehabilitation, Istanbul Physical Medication and Rehabilitation Training and Research Hospital, Istanbul, Turkey
| | - Duygu İnan
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Gizem Yüksel
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Levent Pay
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Kemal Emrecan Parsova
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Elif Gökçen Vatanoğlu
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Mehmet Şeker
- Department of Cardiology, Sultan II. Abdülhamid Han Training and Research Hospital, Istanbul, Turkey
| | - Furkan Durak
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Dr.Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
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Çınar T, Tanık VO, Gürkan K. Comparison of apolipoprotein-A1 levels between paroxysmal atrial fibrillation patients and healthy subjects. J Cardiovasc Thorac Res 2020; 12:140-144. [PMID: 32626555 PMCID: PMC7320999 DOI: 10.34172/jcvtr.2020.23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 05/07/2020] [Indexed: 12/16/2022] Open
Abstract
Introduction: Studies found that the inflammation plays a key role in the pathogenesis of paroxysmal atrial fibrillation (PAF). It is well-known that apolipoprotein-A1 (Apo-A1) demonstrates antiinflammatory and anti-oxidant properties in a healthy physiological system. In the present study, we aimed to determine whether there is any difference of Apo-A1 levels in patients with PAF and healthy subjects.
Methods: In this prospective cohort study, we enrolled a total of 35 PAF patients and 34 comparable healthy participants. Apo-A1 levels were measured from each subject using an immunophelometric method. All enrolled subjects were followed-up for one year during the study period. Results: Serum high-sensitivity C-reactive protein (hs-CRP) levels were statistically higher in PAF patients compared to healthy subjects (1.54±1.99 vs. 1.06±2.01, P = 0.016, respectively). Of note, patients with PAF had lower Apo-A1 levels (1.84±0.74 vs. 2.55±0.44, P = 0.001, respectively). There was no statistical difference between the groups in terms of apolipoprotein-B levels (1.08±0.36 vs. 0.99±0.38, P = 0.339, respectively). We did not find any correlation between Apo-A1 levels and PAF attacks in the study. Conclusion: The main finding of this study was that Apo-A1 levels were significantly lower in PAF patients compared to healthy participants. Based on our results, we considered that Apo-A1 may have a key role in the pathogenesis of PAF.
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Affiliation(s)
- Tufan Çınar
- Health Sciences University, Sultan Abdülhamid Han Training and Research Hospital, Department of Cardiology, Istanbul, Turkey
| | - Veysel Ozan Tanık
- Ankara Dışkapı Yıldırım Beyazıt Training and Research Hospital, Department of Cardiology, Ankara, Turkey
| | - Kadir Gürkan
- Health Sciences University, Siyami Ersek Training and Research Hospital, Department of Cardiology, Istanbul, Turkey
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Tekkeşin Aİ, Velibey Y, Türkkan C, Alper AT, Çakıllı Y, Güvenç TS, Tanık O, Kaya A, Yıldırımtürk Ö, Özbilgin N, Güzelburç Ö, Öz A, Zehir R, Gürkan K. Diastolic Electrocardiographic Parameters Predict Implantable Device Detected Asymptomatic Atrial Fibrillation. Balkan Med J 2017; 34:417-424. [PMID: 28443594 PMCID: PMC5635628 DOI: 10.4274/balkanmedj.2016.0246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Background: Atrial fibrillation is the most common clinically significant arrhythmia. It is now established that atrial high-rate episodes are highly correlated with atrial fibrillation. Aims: To investigate the relation between diastolic electrocardiographic parameters and subclinical atrial fibrillation detected by cardiac implantable electronic devices. Study Design: Ccross-sectional study. Methods: A total of 203 patients who had a dual-chamber, rate-modulated pacing pacemaker implanted due to sinus node dysfunction were prospectively enrolled in this study. Atrial high-rate episodes were defined as any lasting more than 5 min with an atrial rate of ≥220 beats per minute during the previous year. Patient groups were categorized on the basis of pacemaker interrogation as the absence of atrial high-rate episodes [atrial high-rate episodes (-)] and the presence of atrial high-rate episodes [atrial high-rate episodes (+)]. Episodes related to atrial over sensing were excluded. Twelve-lead surface electrocardiography was independently analyzed by two experienced readers for the measurement of diastolic electrocardiography parameters. Results: Among 203 patients (mean age: 67.5±9.1, 60.1% male), 51 (25.1%) with atrial high-rate episodes were defined as group 1 and 152 (74.9%) without atrial high-rate episodes were defined as group 2. Both groups were similar in terms of demographic characteristics and cardiovascular risk factors. Tend-Q and Tend-P were significantly longer in group 2. PQ interval was statistically longer in group 1. Corrected QT interval was significantly longer in group 1. Diastolic electrocardiography index, heart rate and PQ and QT intervals were the only independent predictors of atrial high-rate episodes in patients with dual pacemakers in multivariate analysis. Conclusion: Abnormal diastolic electrocardiography parameters are powerful predisposing factors for the initiation of incident atrial fibrillation. Diastolic electrocardiography parameters and a novel diastolic index predict atrial high-rate episodes. Evaluating these parameters enables clinicians to identify patients who are at high risk and who may benefit from prophylactic treatment.
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Affiliation(s)
- Ahmet İlker Tekkeşin
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Yalçın Velibey
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Ceyhan Türkkan
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Ahmet Taha Alper
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Yasin Çakıllı
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Tolga Sinan Güvenç
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Ozan Tanık
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Adnan Kaya
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Özlem Yıldırımtürk
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Nazmiye Özbilgin
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Özge Güzelburç
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Ahmet Öz
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Regayip Zehir
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, University of Healty Sciences, Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, İstanbul, Turkey
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Özcan KS, Güngör B, Osmonov D, Tekkeşin AI, Altay S, Ekmekçi A, Toprak E, Yildirim E, Çalik N, Alper AT, Gürkan K, Erdinler I. Management and outcome of topical beta-blocker-induced atrioventricular block. Cardiovasc J Afr 2016; 26:210-3. [PMID: 26659434 PMCID: PMC4780015 DOI: 10.5830/cvja-2015-030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Accepted: 03/16/2015] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Topical beta-blockers have a well-established role in the treatment of glaucoma. We aimed to investigate the outcome of patients who developed symptomatic atrioventricular (AV) block induced by topical beta-blockers. METHODS All patients admitted or discharged from our institution, the Siyami Ersek Training and Research Hospital, between January 2009 and January 2013 with a diagnosis of AV block were included in the study. Subjects using ophthalmic beta-blockers were recruited and followed for permanent pacemaker requirement during hospitalisation and for three months after discontinuation of the drug. A permanent pacemaker was implanted in patients in whom AV block persisted beyond 72 hours or recurred during the follow-up period. RESULTS A total of 1 122 patients were hospitalised with a diagnosis of AV block and a permanent pacemaker was implanted in 946 cases (84.3%) during the study period. Thirteen patients using ophthalmic beta-blockers for the treatment of glaucoma and no other rate-limiting drugs were included in the study. On electrocardiography, eight patients had complete AV block and five had high-degree AV block. The ophthalmic beta-blockers used were timolol in seven patients (55%), betaxolol in four (30%), and cartelol in two cases (15%). The mean duration of ophthalmic beta-blocker treatment was 30.1 ± 15.9 months. After drug discontinuation, in 10 patients the block persisted and a permanent pacemaker was implanted. During follow up, one more patient required pacemaker implantation. Therefore in total, pacemakers were implanted in 11 out of 13 patients (84.6%). The pacemaker implantation rate did not differ according to the type of topical beta-blocker used (p = 0.37). The presence of infra-nodal block on electrocardiography was associated with higher rates of pacemaker implantation. CONCLUSION Our results indicate that topical beta-blockers for the treatment of glaucoma may cause severe conduction abnormalities and when AV block occurs, pacemaker implantation is required in a high percentage of the patients.
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Affiliation(s)
- Kazim Serhan Özcan
- Department of Cardiology, Derince Training and Research Hospital, Kocaeli, Turkey. ;
| | - Bariş Güngör
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Damirbek Osmonov
- Department of Cardiology, Almaty Sema Hospital, Almaty, Kazakhstan
| | - Ahmet Ilker Tekkeşin
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Servet Altay
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Ahmet Ekmekçi
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Ercan Toprak
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Ersin Yildirim
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Nazmi Çalik
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Ahmet Taha Alper
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
| | - Izzet Erdinler
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Centre, Istanbul, Turkey
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Kemaloğlu Öz T, Çakmak N, Özpamuk Karadeniz F, Zengin A, Öz A, Altay S, Çınar T, Yılmaz H, Akyüz Ş, Gürkan K. Prevalence of Metabolic Syndrome in Young Patients with ST Elevation Myocardial Infarction and Association of Coronary Artery Lesions. J Am Coll Cardiol 2013. [DOI: 10.1016/j.jacc.2013.08.357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ozcan KS, Osmonov D, Altay S, Dönmez C, Yıldırım E, Türkkan C, Güngör B, Ekmekçi A, Alper AT, Gürkan K, Erdinler I. Pacemaker implantation complication rates in elderly and young patients. Clin Interv Aging 2013; 8:1051-4. [PMID: 23966776 PMCID: PMC3743522 DOI: 10.2147/cia.s47121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Aims To evaluate the complication rate differences between elderly and younger patients who receive a permanent pacemaker implantation. Methods We reviewed all cases admitted to our institution between January 2008 and June 2009 with symptomatic bradyarrhythmia for whom a permanent pacemaker was implanted. Beginning in June 2009, we prospectively collected data from all patients with the same diagnosis and procedure. The frequency of complications due to the pacemaker implantation procedure was evaluated and compared between young (<70 years old) and elderly (≥70 years old) patients. Results Among 574 patients with a permanent pacemaker, 259 patients (45.1%) were below and 315 patients (54.9%) were above or at 70 years of age. There were 240 (92.7%) and 19 (7.3%) dual-chamber pacemaker (DDD) and single-chamber pacemaker (VVI) implanted patients in the younger group, and 291 (76.8%) and 73 (23.2%) DDD and VVI pacemaker implanted patients in the elderly group, respectively. The complication rate was 39 (15.1%) out of 259 young patients and 24 (7.6%) out of 315 elderly patients. Postprocedural complications were statistically lower in the elderly patients than in younger patients (P = 0.005). Conclusion A pacemaker implantation performed by an experienced operator is a safe procedure for patients of advanced age. The patients who are above 70 years old may have less complication rates than the younger patients.
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Affiliation(s)
- Kazım Serhan Ozcan
- Department of Cardiology, siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey.
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Osmonov D, Özcan KS, Altay S, Erdinler I, Yildirim E, Türkkan C, Çanga Y, Alper AT, Çakmak N, Gürkan K. Alzheimer's disease: is pacemaker implantation safe? Am J Alzheimers Dis Other Demen 2012; 27:202-5. [PMID: 22523108 PMCID: PMC10845320 DOI: 10.1177/1533317512444457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2024]
Abstract
AIM To evaluate the safety of pacemaker implantation in patients with Alzheimer's disease (AD). METHODS We reviewed all cases admitted to our institution between January 2008 and June 2009, with symptomatic bradyarrhythmia for whom a permanent pacemaker was implanted. Beginning in June 2009, we prospectively collected data from all patients with the same diagnosis and procedure. Patients with a diagnosis of AD were included in the study. The risks and frequency of complications due to the pacemaker implantation were evaluated. Because of the older age of patients, they were divided into 2 groups to define the effect of age on complication rate. Group 1 consisted of patients aged <75 years, and group 2 consisted of those who are ≥75 years. RESULTS Among the 574 patients with permanent pacemaker, 20 patients (3.4%) had a diagnosis of AD. Three patients with an AD experienced a complication and all were in group 2. However, the rate of complication was not significant within groups (P = 1.000). Reoperation was needed for all of them, and it was significantly higher in patients with AD than in patients without a concomitant disease (P = .006). Patients in group 2 had 3 times higher rate of complication (21.4%) than those without an AD and aged ≥75 years (7.1%; P = .125). CONCLUSION Pacemaker implantation may be of risk in patients with AD, especially in those aged ≥75 years.
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Affiliation(s)
- Damirbek Osmonov
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Kazım Serhan Özcan
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Servet Altay
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Izzet Erdinler
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Ersin Yildirim
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Ceyhan Türkkan
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Yiğit Çanga
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Ahmet Taha Alper
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Nazmiye Çakmak
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
| | - Kadir Gürkan
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey
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Alper AT, Akyol A, Hasdemir H, Yildirim A, Nurkalem Z, Güvenç TS, Cakmak N, Oğuz E, Erdinler IC, Gürkan K. Effect of cardiac resynchronization therapy on mean platelet volume. Acta Cardiol 2008; 63:735-9. [PMID: 19157169 DOI: 10.2143/ac.63.6.2033391] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Cardiac resynchronization therapy (CRT) increases cardiac performance and decreases morbidity and mortality in patients with heart failure. Mean platelet volume (MPV), a marker of platelet hyperreactivity, was found to be increased in both chronic heart failure and thromboembolic events. Systemic and pulmonary thromboembolism is a frequent complication of heart failure.The aim of this study is to determine the effects of cardiac resynchronization therapy on MPV values. METHODS AND RESULTS Fifty-six heart failure patients with increased QRS duration underwent biventricular pacemaker implantation. Blood samples were collected the morning before implantation and at six months follow-up. Response criteria were: an increase in ejection fraction of more than 10% from baseline at six months or no hospitalization for major cardiac events during the first six months.The mean MPV values were decreased from 9.3 +/- 0.5 fl to 8.3 +/- 0.5 fl. Patients with recorded major cardiac events in the follow-up period had no statistically significant decrease in MPV values. CONCLUSIONS In our study we found that cardiac resynchronization therapy leads to a decreased MPV and clinical improvement in patients with heart failure that is accompanied with a decrease in MPV.
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Affiliation(s)
- Ahmet Taha Alper
- Dr. Siyami Ersek Cardiovascular and Thoracic Surgery Training and Research Hospital, Department of Cardiology, Istanbul, Turkey.
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Alper AT, Akyol A, Hasdemir H, Nurkalem Z, Güler Ö, Güvenç TS, Erdinler İ, Çakmak N, Eksik A, Gürkan K. Glue (Toluene) Abuse: Increased QT Dispersion and Relation with Unexplained Syncope. Inhal Toxicol 2008; 20:37-41. [DOI: 10.1080/08958370701758304] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Alper AT, Hasdemir H, Sahin S, Ontürk E, Akyol A, Nurkalem Z, Cakmak N, Erdinler I, Gürkan K. The relationship between nonalcoholic fatty liver disease and the severity of coronary artery disease in patients with metabolic syndrome. Turk Kardiyol Dern Ars 2008; 36:376-381. [PMID: 19155640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
OBJECTIVES Nonalcoholic fatty liver disease (NAFLD) is an important complication of metabolic syndrome (MS). We investigated the possible relationship between NAFLD and angiographical severity of coronary artery disease (CAD) in patients with MS. STUDY DESIGN This prospective study included 80 patients (35 men, 45 women; mean age 63+/-10 years; range 42 to 80 years) with a diagnosis of MS according to the ATP III criteria. All patients underwent abdominal ultrasonography to detect NAFLD. Coronary angiography was performed for stable angina pectoris (n=48), unstable angina pectoris (n=21), and prognostic reasons (n=11). The severity of CAD was assessed by the number of vessels involved (vessel score) and the severity score (Gensini score). Significant stenosis was defined as 70% or greater reduction in lumenal diameter. RESULTS Ultrasonography revealed NAFLD in 43 patients (53.8%). Patients with NAFLD had significantly higher body mass index, waist circumference, and serum triglyceride level, and significantly lower HDL-cholesterol level (p<0.001). Coronary angiography showed significantly higher vessel (2.5+/-0.9 vs 1.0+/-1.0) and CAD severity scores (90.2+/-40.0 vs 36.4+/-28.9) in patients with NAFLD (p<0.001). Univariate analysis showed that the presence of NAFLD (r=0.61, p<0.001), grade of NAFLD (r=0.42, p<0.001), and patient age (r=0.36, p=0.002) were significantly correlated with the CAD severity score. In multivariate linear regression analysis, the presence of NAFLD was the only independent factor affecting the CAD severity score (beta: 1.35, p<0.001). CONCLUSION The presence of NAFLD is associated with more severe CAD, requiring that patients with MS be investigated for the presence of NAFLD and those with NAFLD be attentively followed-up for the presence and severity of CAD.
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Affiliation(s)
- Ahmet Taha Alper
- Department of Cardiology, Siyami Ersek Cardiovascular Surgery Center, Istanbul, Turkey.
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Cakmak N, Akyol A, Sayar N, Alper AT, Hasdemir H, Eksik A, Yilmaz H, Değirmencioğlu A, Erdinler I, Gürkan K. [Comparison of Doppler echocardiographic parameters before and after ablation in Wolff-Parkinson-White syndrome patients with and without atrial fibrillation]. Turk Kardiyol Dern Ars 2008; 36:318-324. [PMID: 18984983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
OBJECTIVES We compared Doppler echocardiographic features before and after radiofrequency catheter ablation (RFCA) performed for Wolff-Parkinson-White (WPW) syndrome in patients with and without atrial fibrillation (AF). STUDY DESIGN Forty patients with WPW syndrome were evaluated in two groups depending on the presence of AF (6 females, 14 males; mean age 33+/-15 years) and atrioventricular reciprocating tachycardia (AVRT) (8 females, 12 males; mean age 32+/-18 years). Echocardiographic examination was performed in all the patients 24 hours before and after RFCA. Doppler parameters were recorded including E and A transmitral filling velocities and their velocity-time integrals (VTI), mitral diastolic filling time (mDFT), deceleration time, isovolumic contraction and relaxation times, aortic ejection time (ET) and aortic VTI. RESULTS The most common localization of the accessory pathway was the left lateral wall (n=9) in patients with AF, compared to one patient in the AVRT group. During programmed electrical stimulation, orthodromic AVRT was induced in all the patients with AVRT; of the AF group, six patients had AF and 14 patients exhibited AVRT that degenerated into AF. The two groups did not differ significantly before and after RFCA with regard to two-dimensional and Doppler echocardiographic parameters (p>0.05). Significant changes observed in both groups after RFCA were as follows: increases in A velocity and A wave VTI (p<0.05), decrease in the E/A ratio (p<0.05), prolongation of mDFT (p<0.001), and shortening of aortic ET (p<0.01). Following the procedure, preexcitation disappeared in all the patients and none had tachyarrhythmia. CONCLUSION There were no echocardiographic parameters associated with AF in patients with WPW syndrome.
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Affiliation(s)
- Nazmiye Cakmak
- Dr Siyami Ersek Göğüs Kalp ve Damar Cerrahisi Eğitim ve Araştirma Hastanesi Kardiyoloji Kliniği, Istanbul, Turkey.
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Alper AT, Sevimli S, Hasdemir H, Nurkalem Z, Güvenç TS, Akyol A, Çakmak N, Durmuş G, Gürkan K. Effects of high altitude and sea level on mean platelet volume and platelet count in patients with acute coronary syndrome. J Thromb Thrombolysis 2007; 27:130-4. [DOI: 10.1007/s11239-007-0159-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2007] [Accepted: 10/12/2007] [Indexed: 10/22/2022]
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Eksik A, Akyol A, Norgaz T, Aksu H, Erdinler I, Cakmak N, Alper AT, Cinar B, Yildirim A, Gürkan K. Circadian pattern of spontaneous ventricular tachyarrhythmias in patients with implantable cardioverter defibrillators. Med Sci Monit 2007; 13:CR412-416. [PMID: 17767121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND Previous studies have reported a circadian variation of ventricular tachyarrhythmias. However, there is no detailed information of the daily distribution of ventricular tachycardia (VT) and ventricular fibrillation (VF) episodes. The purpose of this study was to evaluate the daily distribution of episodes of ventricular tachyarrhythmia in patients with implantable cardioverter defibrillators. MATERIAL/METHODS We used data stored by last-generation implantable cardioverter-defibrillators (ICD) to retrospectively evaluate the circadian distribution of VT and VF in 70 patients with ICD. The distribution of tachyarrhythmias was categorized into four time zones: zone 1 (06:00-11:59), zone 2 (12:00-17:59), zone 3 (18:00-23:59), and zone 4 (00:00-05:59). RESULTS During a follow-up of a mean of 3.1+/-1.3 years, a total of 791 ventricular arrhythmias were recorded from which 631 events were VT and 160 VF. A circadian variation of episodes of ventricular tachyarrhythmia was evident. The incidence of ventricular arrhythmia sharply increased in zone 1 (8.82+/-2.13, p<0.0001). Episodes of VT had peaks in zones 1 and 2 (7.44+/-2.03 and 2.70+/-0.65, p<0.001) and episodes of VF had peaks in zones 1 and 4 (1.38+/-0.39 and 1.30+/-0.51, p<0.011). No difference was observed between patients who used betablocker and those who did not. CONCLUSIONS Malignant ventricular tachyarrhythmias have a circadian distribution. VT peaks occur in the morning and noon hours and VF peaks occurs at the night and morning hours. Betablocker and/or amiodarone usage do not alter this distribution.
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Affiliation(s)
- Abdurrahman Eksik
- Cardiology Department, Siyami Ersek Thoracic and Cardiovascular Surgery Center, Istanbul, Turkey.
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Oguz E, Dagdeviren B, Bilsel T, Erdinler I, Akyol A, Ulufer F, Gürkan K. Effects of atrio-biventricular pacing on cardiac performance and clinical status in patients with advanced heart failure. Eur J Heart Fail 2000. [DOI: 10.1016/s1388-9842(00)80378-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- E. Oguz
- Cardiology, Siyami Ersek Hospital; Ýstanbul Turkey
| | | | - T. Bilsel
- Cardiology, Siyami Ersek Hospital; Ýstanbul Turkey
| | - I. Erdinler
- Cardiology, Siyami Ersek Hospital; Ýstanbul Turkey
| | - A. Akyol
- Cardiology, Siyami Ersek Hospital; Ýstanbul Turkey
| | - F.T. Ulufer
- Cardiology, Siyami Ersek Hospital; Ýstanbul Turkey
| | - K. Gürkan
- Cardiology, Siyami Ersek Hospital; Ýstanbul Turkey
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Heanue JF, Gürkan K, Hesselink L. Signal detection for page-accessoptical memories with intersymbol interference. Appl Opt 1996; 35:2431-2438. [PMID: 21085379 DOI: 10.1364/ao.35.002431] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We propose a technique for data detection in a two-dimensional page-access optical memory. The technique combines sequence detection by the use of the Viterbi algorithm with decision feedback to improve the bit-error-rate performance in a system corrupted by intersymbol interference. It has an advantage in that it can be operated on a row-by-row basis as data are output from the optical detector. Use of the proposed scheme might ease the design tolerances of the optical components or permit the use of large data pages.
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