21 results on '"Önalan, O."'
Search Results
2. Assesment of right ventricular diastolic function in chronic obstructive lung disease [Kronik obstrüktif akci?er hastalı?ında sa? ventrikül diyastolik fonksiyonun de?erlendirilmesi]
- Author
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Yemenici H., Yilmaz A., Kilci H., Ceyhan K., Etikan I., Doruk S., Önalan O., and Tokat Gaziosmanpaşa Üniversitesi
- Subjects
Cor pulmonale ,Chronic obstructive lung disease ,cardiovascular system ,Right ventricular diastolic function ,respiratory tract diseases - Abstract
Objective: Chronic obstructive lung disease (COPD) is a systemic disease characterised by airflow limitation that is not fully reversible. Right ventricular diastolic function (rvdf) was investigated in COPD. Material and Methods: Study groups consisted of 40 patients with COPD and 24 healthy controls. All subjects performed respiratory function test and doppler echocardiography. Results: There was no statistical difference between patient and control groups with respect to tricuspid annular systolic velocity (S), tricuspid annulus early diastolic filling velocity (E) and tricuspid annulus late diastolic velocity (A) (p>0.05). For E/A ratio and İVRT, there was a statistical difference between groups (p=0.05, p=0.0001). There was a positive correlation between FEV1 and E/A ratio (r=0.409, p=0.009). There was no statistically significant correlation between other parameters of Echocardiography (Echo), RFT and arterial blood gas (ABG) analysis comparisons. Decrease in E and E/A ratio in COPD whose SatO2?%90 was statistically significant compared to patients with SatO2>%90 (p=0.002). Decreases in E and E/A rates were significant between COPD cases with PH (pulmonary artery pressure PABsis>30 mmHg), and those without PH (p=0.016, p=0.01). There was no statistically significant correlation between PABsis and FEV1 and FEV1/FVC. There was a negative correlation between PABsis and pO2, and positive correlation between PABsis and pCO2 (p=0.006, p=0.029). There was a positive correlation between FEV1, pO2 and satO2 (p=0.018, p=0.001). Conclusion: As a result, we concluded that, in order to evulate right ventricular functions in COPD cases, we must not only consider systolic functions but also examining the diastolic functions is important. Doppler-Echo proved to be favorable in evaluating rvdf in all COPD patients.
- Published
- 2012
3. QT dispersion effect of spinal and epidural anesthesia
- Author
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Özkan F., Çakir M., Önalan O., Kaya Z., Erkorkmaz U., and Ondokuz Mayıs Üniversitesi
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Electrocardiography ,Cardiac arrytmias ,Local anesthetics ,Epidural anesthesia ,Spinal anesthesia ,Bupivacaine - Abstract
Many studies showed that QT interval and QT dispersion are important as a prognostic factor in cardiac and non-cardiac patients. In this study, we aimed to compare effects of the spinal and epidural anaesthesia which are two different model of the central regional anaesthesia on QT interval. Study group was consisted of 60 adult patients who are ASA I-II and planned the regional anesthesia for elective operations. Before the anaesthesia, Multipurpose Digital ECG holter was placed to the patients. Patients randomly divided into two groups as an epidural anaesthesia (n=30) and spinal anaesthesia (n=30). 100 mg 0,5% isobaric bupivacaine (20 ml) was given for epidural anaesthesia and 15 mg 0,5% isobaric bupivacaine (3 ml) was given spinal anaesthesia at the L3 - L4 or L4 - L5 intervertebral spaces. The surgical operation was allowed in patients when the sensory block reached the T10 dermatome level. The preoperative and postoperative hemodynamic parameters, QT intervals and QTa (QT apex) measurements were evaluated. The preoperative heart rate and mean arterial pressure values had decreased during the process without any effect on the hemodynamic stability and this rise was similar in both groups. There was significant increase in the QTa values after regional anaesthesia within the epidural and spinal anaesthesia groups (p
- Published
- 2009
4. QT dynamicity and heart rate variability for prediction of adverse outcome during in hospital follow-up
- Author
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Sade, E., primary, Aytemir, K, additional, Özer, N, additional, Övünç, K, additional, Aksöyek, S, additional, Önalan, O., additional, Nazli, N., additional, Özmen, F., additional, Kes, S., additional, and Oto, A., additional
- Published
- 2001
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5. Is ventricular repolarization heterogeneity a cause of serious ventricular tachyarrhythmias in aortic valve stenosis?
- Author
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Batur, M. K., primary, Açil, T., additional, Önalan, O., additional, Yildirir, A., additional, Övünç, K., additional, Kabakci, G., additional, Oto, A., additional, Özkutlu, H., additional, Nazli, N., additional, Gürsel, G., additional, and Kes, S., additional
- Published
- 2000
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6. QT dynamicity and heart rate variability for prediction of adverse outcome during in hospital follow-up.
- Author
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Sade, E., Aytemir, K, Özer, N, Övünç, K, Aksöyek, S, Önalan, O., Nazli, N., Özmen, F., Kes, S., and Oto, A.
- Published
- 2000
7. Novel predictor for metabolic syndrome: Para-aortic adipose tissue.
- Author
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Çakan F, Adar A, Akıncı S, Köktürk U, Akbay E, and Önalan O
- Abstract
Background: Metabolic Syndrome (MetS) is an independent risk factor for cardiovascular disease. Perivascular fat depots not only serve as energy storage but also function as endocrine organs. Para-aortic adipose tissue (PAT), a perivascular local adipose tissue, has been suggested to play a role in obesity-mediated vascular disease, and has been associated with MetS components and measures of coronary and abdominal aortic calcification. PAT was previously described and examined using tomography and magnetic resonance imaging. This study aimed to describe the features of para-aortic adipose tissue measured echocardiographically in individuals with MetS., Methods: Patients were divided into two groups according to their MetS status. The hypoechoic space in front of the ascending aorta was considered a PAT on the parasternal long-axis view. Possible covariates for the regression analysis were determined using the DAGitty diagram., Results: A total of 494 patients were enrolled in this study. The PAT was significantly higher in the MetS group [9.6 (6.1/10.6) vs. 6.1 (0.9/9) mm, p < 0.001]. Logistic regression analysis revealed that PAT (OR=2,15, p = 0,003) was significantly associated with MetS. 7.55 mm of PAT has a sensitivity of 65 % and specificity of 65 % [AUC = 0.675, p < 0.001, 95 % CI (0.623-0.726)] in predicting the presence of MetS., Conclusions: Based on the measurements obtained using this newly described modality in transthoracic echocardiography, its relationship with MetS was determined. These results can guide clinicians in diagnosing MetS., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier Inc.)
- Published
- 2024
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8. Clinical characteristics of atrial fibrillation in nonagenarian population and relationship with mortality.
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Çakan F, Önalan O, Adar A, Akbay E, Çöllüoğlu IT, Köktürk U, Akin Y, and Özçalik E
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- Humans, Male, Female, Aged, 80 and over, Risk Factors, Follow-Up Studies, Proportional Hazards Models, Atrial Fibrillation mortality, Atrial Fibrillation epidemiology
- Abstract
Background: There is a considerable amount of literature available on well-known risk factors for atrial fibrillation (AF); however, available data specifically focused on the ninth decade are scarce. The main objective of this study was to assess the demographic and clinical characteristics of AF and sinus rhythm in a nonagenarian population., Methods: All individuals aged >90 years who were admitted to the Cardiology outpatient clinic between April 2018 and January 2019 were enrolled in the study. The demographic and clinical characteristics of all patients were recorded. All deaths that occurred during the two-year follow-up period were recorded., Results: In total, 112 nonagenarian individuals were included in the study. Of these patients, 50 (44.6%) had AF. The groups showed similarities in demographic and clinical characteristics. During a mean follow-up period of 596±44 days, 39 patients (78%) in the AF group and 35 patients (56.5%) in the sinus group died. Patients with AF showed a lower overall survival distribution than those with sinus rhythm (P=0.005, log-rank test χ
2 =7.734). AF was associated with an increased risk of mortality (P=0.002, hazard ratio [HR] =2.104, 95% confidence interval [CI] = 1.326-3.339) in multivariate Cox regression analysis, while waist circumference and total cholesterol (P=0.003, HR=0.969, 95% CI=0.949-0.989 and P=0.046, HR=0.993, 95% CI=0.986-1.000, respectively) showed a decreased risk of mortality., Conclusions: Atrial fibrillation is very common in individuals over the age of 90 years (44.6%). Well-known risk factors do not appear to be effective in this age group, and AF is associated with a 2.1-fold increase in the risk of mortality.- Published
- 2024
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9. The Effect of Early Administration of Hypertonic Saline Solution İn Acute Decompensated Heart Failure.
- Author
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Colluoglu T, Kapanşahin T, Aksu MH, Önalan O, and Akin Y
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- Humans, Female, Male, Saline Solution, Hypertonic administration & dosage, Retrospective Studies, Aged, Case-Control Studies, Middle Aged, Treatment Outcome, Acute Disease, Sodium Potassium Chloride Symporter Inhibitors administration & dosage, Sodium Potassium Chloride Symporter Inhibitors therapeutic use, Aged, 80 and over, Time Factors, Hospitalization statistics & numerical data, Sodium blood, Heart Failure drug therapy, Heart Failure physiopathology, Heart Failure mortality
- Abstract
Background: There was no scientific evidence about the initial treatment of hypertonic saline solution (HSS) in acutely decompensated heart failure (ADHF)., Objectives: This study assessed the impact of using HSS along with a loop diuretic (LD) as the first diuretic treatment for ADHF, focusing on renal function, electrolyte levels, and clinical outcomes., Methods: In this retrospective case-control study, 171 adult patients (93 females/78 males) with ADHF were included between January 1, 2022, and December 31, 2022. Patients were allocated into two groups: upfront combo HSS+LD and standardized LD. The primary endpoint was worsening renal function (WRF). Hospitalization for HF and all-cause mortality were evaluated during 6 months of follow-up. The significance level adopted in the statistical analysis was 5%., Results: The groups exhibited similarities in baseline characteristics.A significantly higher diuresis on the 1st day (3975 [3000-5150] vs. 2583 [2000-3250], p=0.001) and natriuresis on the 2nd hour (116.00 [82.75-126.00] vs. 68.50 [54.00-89.75], p=0.001) in the initial upfront combo HSS+LD were found in comparison with the standardized LD.When compared to the standardized LD, the utilization of HSS led to an increase in serum Na+ (137.00 [131.75-140.00] vs. 140.00 [136.00-142.25], p=0.001 for upfront combo HSS, 139.00 [137.00-141.00] vs. 139.00 [136.00-140.00], p=.0470 for standardized LD), while chloride (99.00 [94.00-103.25] vs. 99.00[96.00-103.00], p=0.295), GFR (48.50 [29.75-72.50 vs. 50.00 [35.50-63.50, p=0.616), and creatinine (1.20 [0.90-1.70] vs. 1.20 [1.00-1.50], p=0.218) remained stable in the upfront combo HSS group when compared to standardized LD group (Cl-: 102.00 [99.00-106.00] vs. 98.00 [95.00-103.00], p=0.001, eGFR: 56.00 [41.00-71.00] vs. 55.00 [35.00-71.00], p=0.050, creatinine:1.10 [0.90-1.40] vs. 1.20 [0.90-1.70], p=0.009). Worsening renal function (16.1% vs 35.5%, p=0.007), and length of stay in the hospital (4 days [3-7] vs. 5 days [4-7], p=0.004) were lower in the upfront combo HSS+LD in comparison with the standardized LD. In-hospital mortality, hospitalization for HF, and all-cause mortality were similar between the two groups., Conclusion: HSS as an initial therapy, when combined with LD, may provide a safe and effective diuresis without impairing renal function in ADHF. Therefore, HSS may lead to a shorter length of stay in the hospital for these patients.
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- 2024
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10. Impact of triglyceride-glucose index on intracoronary thrombus burden in ST-elevation myocardial infarction patients undergoing primary percutaneous coronary intervention.
- Author
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Köktürk U, Önalan O, Somuncu MU, Akgül Ö, Uygur B, and Püşüroğlu H
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- Humans, Glucose, Triglycerides, Risk Factors, Retrospective Studies, Coronary Angiography, ST Elevation Myocardial Infarction diagnostic imaging, ST Elevation Myocardial Infarction therapy, Percutaneous Coronary Intervention adverse effects, Myocardial Infarction, Thrombosis
- Abstract
Background and Aims: We aimed to investigate the relationship between triglyceride glucose (TyG) index and intracoronary thrombus burden in patients with ST-elevation myocardial infarction (STEMI) who underwent primary percutaneous coronary intervention (PCI)., Methods and Results: A total of 468 consecutive patients who were admitted with STEMI and underwent primary PCI were included in the study. TyG index was calculated as ln [fasting triglycerides (mg/dL) × fasting plasma glucose (mg/dL)/2]. According to the angiographic reclassified thrombolysis in myocardial infarction (TIMI) thrombus grade, patients were divided into two groups as small thrombus burden (STB) with TIMI thrombus grade 0-3, and large thrombus burden (LTB) with TIMI thrombus grade 4-5. TyG index was significantly higher in the LTB group than in the STB group (9.11 ± 0.86 vs 8.89 ± 0.62; p = 0.002). In multivariate analysis, TyG index was found to be an independent predictor of LTB in STEMI patients who underwent primary PCI [OR (95 % CI): 1.470 (1.090-1.982), p = 0.012]. The area under the curve (AUC) of TyG index predicting LTB was 0.568 (95 % CI 0.506-0.631; p = 0.023), with the best cut-off value of 8.87. In the classification according to TyG index cut-off value, the frequency of LTB was found to be significantly higher in the high TyG index group than in the low TyG index group (33.6 % vs 21.2 %; p = 0.003)., Conclusion: TyG index, a valid surrogate marker of insulin resistance, is an independent predictor of LTB in STEMI patients who underwent primary PCI and can be used as an indicator of increased intracoronary thrombus burden., Competing Interests: Declaration of competing interest There are no conflicts of interest., (Copyright © 2024 The Italian Diabetes Society, the Italian Society for the Study of Atherosclerosis, the Italian Society of Human Nutrition and the Department of Clinical Medicine and Surgery, Federico II University. Published by Elsevier B.V. All rights reserved.)
- Published
- 2024
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11. Aortic Arch Calcification in Predicting Unfavorable Angiographic Outcomes for Patients with ST-Elevation Myocardial Infarction Undergoing Percutaneous Coronary Intervention.
- Author
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Köktürk U, Önalan O, Somuncu MU, Çakan F, Güdül NE, Erbay İ, and Avcı A
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- Humans, Male, Female, Middle Aged, Aged, Prospective Studies, Vascular Calcification diagnostic imaging, Risk Factors, No-Reflow Phenomenon, Percutaneous Coronary Intervention, ST Elevation Myocardial Infarction surgery, ST Elevation Myocardial Infarction diagnostic imaging, Coronary Angiography, Aorta, Thoracic surgery, Aorta, Thoracic diagnostic imaging
- Abstract
Background: Despite advances in treatment, no-reflow, large thrombus burden (LTB), and myocardial blush grade (MBG) are associated with adverse cardiovascular outcomes in ST-elevation myocardial infarction (STEMI) patients undergoing percutaneous coronary intervention (PCI). Aortic arch calcification (AAC) is associated with subclinical atherosclerosis and adverse cardiovascular events. We aimed to examine the relationship between AAC and unfavorable angiographic outcomes such as no-reflow, MBG, and LTB in STEMI patients undergoing PCI., Methods: A total of 269 consecutive patients who presented with STEMI and underwent primary PCI were included in the study prospectively. Patients were divided into 3 groups according to AAC degree: grade 0, grade 1, and grade 2/3. The relationship between AAC and the predictors of unfavorable angiographic outcomes, including LTB, no-reflow, and MBG, was specifically examined., Results: LTB, no-reflow, and MBG 0/1 were significantly higher in the grade 2/3 AAC group compared to the grade 0 and grade 1 groups (all p < 0.05). Moreover, grade 2/3 AAC was found to be an independent predictor for LTB, MBG 0/1, and no-reflow (p = 0.002, p = 0.005, p = 0.004, respectively). Patients were then classified according to thrombus burden, MBG, and no-reflow status. Grade 2/3 AAC was significantly higher than grade 0/1 AAC in the LTB, MBG 0/1, and no-reflow groups (all p < 0.05)., Conclusion: AAC can be used as a reliable indicator in predicting no-reflow, MBG 0/1, and LTB in STEMI patients undergoing primary PCI., (© 2024 The Author(s). Published by S. Karger AG, Basel.)
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- 2024
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12. An interesting observation: prolonged green urine can be a combined effect of decreased liver and renal function in a patient with heart failure-a case report.
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Çöllüoğlu T, Aksu MH, Önalan O, and Akın Y
- Abstract
Background: The administration of propofol and methylene blue (MB) can be associated with the appearance of prolonged green urine discoloration, particularly in patients with heart failure (HF) concomitant with renal and liver dysfunction. Understanding the reasons behind this phenomenon is of clinical significance., Case Summary: A 79-year-old woman with a history of HF experienced dyspnoea and persistent green urine discoloration for a week, leading to her hospitalization for acutely decompensated HF. A recent dual-chamber rate-modulated-pacemaker implantation had necessitated propofol sedation and the administration of 100 mg of MB due to methaemoglobinaemia. Upon admission, the patient exhibited elevated levels of brain natriuretic peptide (BNP) and liver function tests, as well as a significant decrease in glomerular filtration rate (GFR). Initial therapy with intravenous furosemide yielded an inadequate response, requiring the initiation of combined diuretic therapy (CDT). The patient's condition improved with CDT, resulting in the normalization of BNP, liver function tests, and GFR, along with the restoration of normal urine colour lasting 12 days., Discussion: Our case report sheds light on the complex interaction between drug metabolic pathways and their potential for prolonged side effects, particularly in patients with multiorgan dysfunction. The association between propofol, MB, and green urine discoloration in the context of HF warrants further investigation, emphasizing the need for increased awareness of drug interactions and their implications in complex clinical scenarios., Competing Interests: Conflict of interest: None declared., (© The Author(s) 2023. Published by Oxford University Press on behalf of the European Society of Cardiology.)
- Published
- 2023
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13. The diagnostic value of 2D-speckle tracking echocardiography for identifying subclinical ventricular dysfunction in subjects with early repolarization pattern.
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Çöllüoğlu T, Önalan O, and Çakan F
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- Heart Ventricles diagnostic imaging, Humans, Systole, Ventricular Function, Left, Echocardiography, Ventricular Dysfunction, Left diagnostic imaging
- Abstract
Introduction: Early repolarization pattern (ERP) can exist a silent substrate for arrhytmic events in accordance with the previous studies which have shown there has been evidence of morphological changes in left ventricle (LV) in ERP subjects. Despite structural changes in ERP subjects, it has not exactly known whether a change in LV functional parameters occur in ERP. The aim of our study was to investigate LV functional parameters in ERP athletes evaluated by 2D- speckle tracking echocardiography (2D-STE)., Method: In this study, athletes with ERP (n = 50) and athletes without ERP (n = 50) were recruited between April 2018 and September 2018. For each case, 2D- TTE and 2D- STE evaluation were performed by the same cardiologist., Results: Left ventricle mean global longitudinal strain (GLS) (P < .001) and GLS at all apical chamber views (P < .001), longitudinal peak systolic strain rate (SRS) at A3C (P: .011), early diastolic strain rate (SRE) at A3C (P < .001) and late diastolic strain rate (SRA) at A3C (P: .034) in the ERP athletes were significantly lower than those in the athletes without ERP. LV basal segment circumferential SRS (P: .002) and SRE (P: .006) were significantly lower in ERP athletes compared to athletes without ERP. LV mechanical dispersion was significantly higher in ERP athletes compared to athletes without ERP (P < .001)., Conclusion: Our study suggests ERP can be more associated with impaired LV longitudinal function than circumferential function. In addition, both LV inferolateral region and basal segment can be more affected functionally in ERP athletes., (© 2021 Wiley Periodicals LLC.)
- Published
- 2021
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14. An unusual cause of lacunar infarcts: Lambl's excrescences on aortic valve shown in detail by 3D transesophageal echocardiography.
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Çöllüoğlu T and Önalan O
- Abstract
Lambl's excrescences (LE) are rare cardiac structures. They are associated with catastrophic thromboembolic and coronary events. Despite resulting in such important events, 2D echocardiographic imaging modalities may overlook LE owing to very thin cardiac structures. So, 3D echocardiographic imaging modalities may fully offer this cardiac mass and provide us to more accurately guess the complication rate related to LE due to the fact that 3D echocardiographic imaging techniques have higher spatial resolution and are not based on the geometric assumption. Indeed, another benefit of 3D echocardiographic imaging modalities in this population is that these imaging modalities clearly provide the relationship to adjacent structures of LE and its movement over a cardiac cycle in 3D space. In our case report, we aim to present the usefulness of 3D echocardiography as a modality to clearly offer all features of LE, furthermore to give valuable information about management in patients with thromboembolic events leading to LE ., (© The Author(s) 2019. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
- Published
- 2019
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15. Development of Pacemaker Lead Thrombosis in a Patient with Atrial Fibrillation during Apixaban Treatment.
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Adar A, Önalan O, and Cakan F
- Abstract
Apixaban was introduced in clinical use for nonvalvular atrial fibrillation as an alternative to warfarin. There is a dearth of information regarding apixaban use in patients suffering from atrial fibrillation with intracardiac foreign bodies such as pacemaker leads. In this report, we describe a 72-year-old female patient with a complaint of weakness in both legs of a few days' duration. She was detected to have a thrombus over the pacemaker lead and inside the left atrial appendage during apixaban treatment. After the discontinuation of apixaban and the commencement of warfarin, the thrombus was resolved. Our case is the first report to show that apixaban treatment (5 mg, twice daily) may not prevent the development of pacemaker lead thrombosis in patients with atrial fibrillation., (Copyright © 2015 Tehran Heart Center, Tehran University of Medical Sciences.)
- Published
- 2019
16. Presence of fragmented QRS may be associated with complex ventricular arrhythmias in patients with essential hypertension.
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Bekar L, Kalçık M, Kilci H, Çelik O, Yetim M, Doğan T, and Önalan O
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- Arrhythmias, Cardiac diagnosis, Essential Hypertension complications, Female, Humans, Middle Aged, Stroke Volume, Electrocardiography, Ventricular Function, Left
- Abstract
Background: Ventricular arrhythmias (VAs) are frequent in hypertensive patients. Myocardial fibrosis is one of the components of left ventricular hypertrophy secondary to hypertension. Fragmented QRS (fQRS) on electrocardiography (ECG) has been shown to be a marker of myocardial fibrosis. In this study, we aimed to investigate the association between fQRS and complex VAs in patients with essential hypertension., Methods: Two hundreds consecutive patients who were diagnosed with hypertension were included in the study. The control group consisted of 153 age and sex matched healthy individuals. ECG and transthoracic echocardiography were performed to all patients. fQRS was defined as additional R' wave or notching/splitting of S wave in two contiguous ECG leads. All patients underwent 24-hour Holter monitoring and VAs were classified using Lown's scoring system. Lown class ≥3 VAs were considered as complex VAs., Results: There was no significant difference with respect to age (52 ± 8 vs 52 ± 6 years, p = 0.836) and gender distribution (female: 64% vs 63%, p = 0.907) between the groups. As compared to the healthy individuals, prevalence of fQRS (67% vs 9.2%, p < 0.001) and complex VAs (19% vs 0%, p < 0.001) were significantly higher in patients with hypertension. Furthermore, complex VAs (25.4% vs 6.1%, p = 0.001) were significantly higher in hypertensive patients with fQRS. In multiple logistic regression analysis, left ventricular ejection fraction (OR: 1.11, 95%CI: 1.025 to 1.183; p = 0.006), left ventricular mass index (OR: 1.04, 95%CI: 1.021 to 1.107; p = 0.001) and presence of fQRS (OR: 5.605, 95%CI: 1.427 to 22.019; p = 0.014) were independent predictors for complex VAs., Conclusion: The presence of fQRS may be associated with complex VAs in patients with essential hypertension. Therefore, fQRS may be used in risk stratification of complex VAs and sudden cardiac death especially in hypertensive patients with left ventricular hypertrophy., (Copyright © 2019 Elsevier Inc. All rights reserved.)
- Published
- 2019
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17. Pregbalin induced recurrent syncopal attacks with prolong QT interval.
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Adar A, Cakan F, and Önalan O
- Subjects
- Aged, 80 and over, Female, Humans, Long QT Syndrome diagnosis, Long QT Syndrome physiopathology, Recurrence, Syncope diagnosis, Syncope physiopathology, Analgesics adverse effects, Electrocardiography methods, Long QT Syndrome chemically induced, Pregabalin adverse effects, Syncope chemically induced
- Abstract
Long QT syndrome may lead to fatal dysrhythmia. Prolongation of QT interval due to pregabalin has been shown in rats and no data is available in humans. We report a 80-year-old female patient using pregabalin. She was presented to emergency room with syncope attacks. Her admission electrocardiography demonstrated prolonged QT interval. After excluding the possible causes of the long QT syndrome, we attributed prolonged QT interval to pregabalin therapy. After discontinuation of pregabalin QT interval returned to normal range and patient experienced no further syncope attacks. It is first time for documentation of prolonged QT due to pregabalin in humans., (© 2017 Wiley Periodicals, Inc.)
- Published
- 2018
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18. Fragmented QRS complexes are a marker of myocardial fibrosis in hypertensive heart disease.
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Bekar L, Katar M, Yetim M, Çelik O, Kilci H, and Önalan O
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- Biomarkers blood, Electrocardiography, Female, Fibrosis blood, Fibrosis diagnosis, Fibrosis physiopathology, Humans, Hypertension, Male, Middle Aged, ROC Curve, Cardiomyopathies blood, Cardiomyopathies diagnosis, Cardiomyopathies physiopathology, Peptide Fragments blood, Procollagen blood
- Abstract
Objective: Carboxy-terminal propeptide of type 1 procollagen (PICP) is a marker of extracellular collagen synthesis. Fragmented QRS (fQRS) on a 12-lead electrocardiogram (ECG) has been demonstrated as a marker of myocardial fibrosis. The present objective was to investigate the association between serum PICP concentration and presence of fQRS on ECG in hypertensive patients., Methods: Consecutive patients with previously or newly diagnosed hypertension were included. fQRS was defined as the presence of additional R-wave (R'), or notching of R- or S-waves, or the presence of fragmentation in 2 contiguous ECG leads. Serum PICP levels were measured by ELISA method., Results: The study group consisted of 90 hypertensive patients (74% females, with a mean age of 54.7±8.5 years). Of these patients, 47 (52.2%) had fQRS on ECG. Age (p=0.121) and gender distribution (p=0.625) were similar in patients with or without fQRS. Receiver operating characteristic curve analysis yielded a strong predictive ability of PICP levels for the presence of fQRS (area under the curve: 0.850; 95% CI: 0.772-0.929; p<0.0001). In multivariate logistic regression analysis, PICP levels were strongly and independently associated with the presence of fQRS (OR: 1.938; 95% CI: 1.398-2.688)., Conclusion: Serum PICP level is a strong and independent predictor of fQRS. Discriminative performance of serum PICP levels for the presence of fQRS is high. The present results are the first to demonstrate that fQRS may indicate myocardial fibrosis in patients with hypertension.
- Published
- 2016
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19. The protective effect of single dose tadalafil in contrast-induced nephropathy: an experimental study.
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Özbek K, Ceyhan K, Koç F, Söğüt E, Altunkaş F, Karayakalı M, Çelik A, Kadı H, Köseoğlu RD, and Önalan O
- Subjects
- Administration, Oral, Animals, Dose-Response Relationship, Drug, Female, Malondialdehyde blood, Malondialdehyde metabolism, Rats, Rats, Wistar, Renal Insufficiency blood, Renal Insufficiency chemically induced, Contrast Media adverse effects, Phosphodiesterase 5 Inhibitors administration & dosage, Renal Insufficiency prevention & control, Tadalafil administration & dosage
- Abstract
Objective: Contrast-induced nephropathy (CIN) is one of the most common causes of acute renal failure in hospitalized patients. The direct toxic effect of contrast media; ischemic damage caused by reactive oxygen species; increased perivascular hydrostatic pressure; high viscosity and changes in the activity of vasoactive substances play important roles in the pathogenesis. Tadalafil inhibits the phosphodiesterase enzyme which destroys nitric oxide. Nitric oxide causes renal vasodilatation, increases renal medullar blood flow and mediates the removal of free oxygen radicals. Drugs that increase levels of nitric oxide are expected to reduce the development of contrast nephropathy due to contrast media. We aimed to test the hypothesis that tadalafil reduces the development of contrast nephropathy due to contrast toxicity., Methods: A total of 24 female Wistar albino rats, three groups of eight, were included in the study. After 48 hours of dehydration, contrast media (meglumine diatrozoate, 6 mL/kg) was administered to the first group, and contrast media with tadalafil (10 mg/kg) was administered to the second group. The third group served as the control group. Blood and tissue samples were taken 48 hours after this procedure., Results: Serum cystatin C, serum creatinine and blood urea nitrogen (BUN) values were significantly lower in the contrast with tadalafil group compared to the group given only contrast. Serum and tissue malondialdehyde (MDA) levels were significantly lower in the contrast with tadalafil group than in the contrast only group., Conclusion: These results demonstrate the protective effect of tadalafil in the prevention of CIN in rats.
- Published
- 2015
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20. Reply to the letter by Ertem et al. Entitled 'is coronary circulation the most important parameter for right ventricular functions?'.
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Altunkas F, Koç F, Ceyhan K, Çelik A, Kadı H, Karayakalı M, Özbek K, Burucu T, Öztürk A, and Önalan O
- Subjects
- Female, Humans, Male, Vascular Diseases epidemiology, Ventricular Dysfunction, Left epidemiology, Ventricular Dysfunction, Right epidemiology
- Published
- 2015
- Full Text
- View/download PDF
21. Case images: Transthoracic echocardiographic and angiographic view of a coronary-to-left ventricular fistula.
- Author
-
Altunkaş F, Özbek K, Karayakalı M, and Önalan O
- Subjects
- Angiography, Fistula, Humans, Echocardiography, Heart Ventricles diagnostic imaging
- Published
- 2012
- Full Text
- View/download PDF
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