Contemporary outcomes of catheter ablation of the structural ventricular tachycardias in severe ischemic and non-ischemic cardiomyopathies in Turkish population.

Introduction: Currently, there are no data regarding outcomes of the catheter ablation for structural ventricular tachycardia (VT) in Türkiye. In this observational study, we aim to investigate cardiac outcomes of patients undergoing catheter VT ablation at a tertiary center in Türkiye.

Methods: This was a retrospective observational study performed at a single university center.

Taming the Tiger: Partial Input Block Results in a Stable, Organized Coronary Sinus Activation During Atrial Fibrillation.

In this manuscript, we present a case where coronary sinus activation was organized and stable despite the rhythm being atrial fibrillation. We discuss the possible mechanisms of this rare occurrence.

Bipolar radiofrequency ablation between middle cardiac vein and left ventricular endocardium for intramural ventricular tachycardia originating from the left ventricular inferobasal septum.

Ventricular tachycardia ablation in the post-surgical patients is complicated by difficult epicardial access. Endocardial-only ablation may lead to failure which can be prevented by mapping and ablating inside the coronary venous system. Radiofrequency ablation inside the coronary venous system is dependent on anatomical and biophysical factors.

Cardioneuroablation for carotid sinus syndrome mediated by complete atrioventricular block.

Carotid sinus syndrome (CSS) is a rare condition leading to recurrent syncope. Permanent pacemaker implantation is the mainstay treatment of cardioinhibitory CSS. In this report, we present a CSS patient with reproducible atrioventricular block during carotid massage, who was treated with cardioneuroablation.

Procedural Characteristics, Safety, and Follow-up of Modified Right-Sided Approach for Cardioneuroablation.

Background: Cardioneuroablation is one of the emerging therapies in vasovagal syncope. In this study, we present a simple method of cardioneuroablation performed via a rightsided approach, targeting anterior-right and right-inferior ganglionated plexi, along with procedural and follow-up data.

Methods: Patients who had underwent cardioneuroablation between March 2018 and September 2019 with vasovagal syncope in 2 clinics were enrolled in the study.

Long-Term Results of Pulmonary Vein Isolation Plus Modified Posterior Wall Debulking Utilizing High-Power Short-Duration Strategy: An All-Comers Study in Real World.

Background: High-power short-duration radiofrequency ablation has improved lesion durability in pulmonary vein isolation. In this study, we investigate long-term clinical out-comes of high-power short-duration pulmonary vein isolation and posterior wall debulk- ing as an initial treatment modality in all corner atrial fibrillation patients.

Methods: This is a single-center, retrospective, observational study including all patients who have undergone high-power short-duration pulmonary vein and posterior wall deb-ulking, regardless of atrial fibrillation type and/or duration.

Upgrades from Previous Cardiac Implantable Electronic Devices Compared to De Novo Cardiac Resynchronization Therapy Implantations: Results from CRT Survey-II in the Turkish Population.

Objective: Cardiac resynchronization therapy is the guideline-directed treatment option in selected heart failure with reduced left ventricular ejection fraction patients. Data regarding the contemporary clinical practice of cardiac resynchronization therapy in Turkey have been published recently. This sub-study aims to compare clinical and periprocedural characteristics between cardiac resynchronization therapy upgrade and de novo implantations.

Stepwise mapping and ablation algorithm in patients undergoing ablation of unstable, unmappable scar-based atrial tachycardias.

Background: Scar based atrial tachycardia (AT)'s usually presents with a complex electrophysiological substrate. It is not uncommon that multiple instable ATs are present in a single patient. The aim of this study was to analyze clinical and electrophysiological characteristics of patients who had undergone ablation for instable ATs, and report outcomes of the stepwise substrate ablation procedure during the follow-up.

Triple gastrointestinal prophylactic therapy following high-power short-duration posterior left atrial wall ablation.

The purpose of this study is to investigate incidence of gastrointestinal symptoms and complications in patients who underwent high-power short-duration (HPSD), posterior left atrial wall isolation during atrial fibrillation ablation and thereafter have received gastrointestinal prophylactic regimen consisting of sucralfate, proton-pump inhibitor and colchicine. Patients were followed and assessed at baseline, up until 6th month following the procedures.Among 115 patients who were included, 5 patients (4.

Late elimination of challenging idiopathic ventricular arrhythmias originating from left ventricular summit by anatomical ablation.

Ablation of premature ventricular complexes (PVCs) originating from left ventricular outflow tract (LVOT)/left ventricular summit (LVS) is challenging with considerable rate of failure. Recently, in a novel approach to ablation of these arrythmias, application of radiofrequency energy to anatomically opposite sites of presumed origin of arrythmia, has been associated with moderate procedure success. Although late elimination of PVCs that are persistent following an ablation procedure has been previously reported, this observation has not been studied sufficiently.

Effect of radiofrequency on epicardial myocardium after ablation of ventricular arrhythmias from within coronary sinus.

Background: Radiofrequency (RF) ablation of idiopathic ventricular arrhythmias (IVA) from the coronary venous system (CVS) has been increasingly performed, but real effect of ablation lesions from CVS on epicardial myocardium has not been studied.

Objective: To compare effects of RF delivered inside the distal CVS during ablation of IVAs originating from left ventricular summit (LVS) with IVAs ablated from right ventricular outflow tract (RVOT) using cardiac magnetic resonance imaging (CMRI).

Methods: Twenty consecutive patients with IVAs who underwent acutely successful RF ablation at initial appropriate sites, i.

Functional compared to anatomical imaging in the initial evaluation of patients with suspected coronary artery disease: An international, multi-center, randomized controlled trial (IAEA-SPECT/CTA study).

Objective: To test the hypothesis that, in the initial evaluation of patients with suspected coronary artery disease (CAD), stress myocardial perfusion imaging (MPI) would result in less downstream testing than coronary computed tomographic angiography (CCTA).

Methods: In this international, randomized trial, mildly symptomatic patients with an intermediate likelihood of having CAD, and asymptomatic patients at intermediate risk of cardiac events, underwent either initial stress-rest MPI or CCTA. The primary outcome was downstream noninvasive or invasive testing at 6 months.

[Clinical outcome and factors affecting surgical decision for repair versus replacement in patients with mitral regurgitation].

Objective: We aimed to identify characteristics differentiating patients undergoing mitral valve replacement versus valve repair for mitral regurgitation (MR) and to investigate retrospectively mid-term clinical and functional outcomes.

Methods: From January, 2004 to January, 2009 146 patients underwent mitral valve surgery (62 male / 84 female; age: 55.9+/-13.

The relationship between angiotensin converting enzyme gene I/D polymorphism and QT dispersion in patients with hypertrophic cardiomyopathy.

Introduction: Hypertrophic cardiomyopathy (HCM) is characterized by disorganized myocardial architecture, and may cause ventricular arrhythmias and sudden death. The angiotensin-converting enzyme (ACE) with two deletion alleles (DD genotype) has been proposed to be associated with increased myocardial collagen content. We evaluated QT dispersion (QTd), which reflects regional differences in ventricular repolarization, in HCM patient and controls among the three different ACE genotypes.

Facilitation of radial artery cannulation by periradial subcutaneous administration of nitroglycerin.

Purpose: To determine whether subcutaneous administration of nitroglycerin mixed with local anesthetic agent results in effective vasodilation of the radial artery, and whether this technique improves access time and decreases complications.

Materials And Methods: This prospective study consisted of two consecutive investigations. In the first (n = 30), only local anesthetic agent (prilocaine 2%) was injected into one arm, and local anesthetic agent plus 500 microg nitroglycerin was injected into the other arm.

The relation between endothelial dependent flow mediated dilation of the brachial artery and coronary collateral development - a cross sectional study.

Background: Endothelial dysfunction is thought to be a potential mechanism for the decreased presence of coronary collaterals. The aim of the study was to investigate the association between systemic endothelial function and the extent of coronary collaterals.

Methods: We investigated the association between endothelial function assessed via flow mediated dilation (FMD) of the brachial artery following reactive hyperemia and the extent of coronary collaterals graded from 0 to 3 according to Rentrop classification in a cohort of 171 consecutive patients who had high grade coronary stenosis or occlusion on their angiograms.

The impact of the distance between the atrial electrode and the atrial wall on atrial undersensing in patients with VDD pacemakers: long-term follow-up.

Aim: Atrial undersensing (AUS) in single-lead VDD pacemakers may be due to diminished P-wave amplitude secondary to local inflammation beneath the electrodes closer to atrial wall. The aim of this study was to assess the potential effect of distance between atrial electrode and atrial wall on immediate and long-term atrial sensing stability in VDD systems.

Methods: A total of 275 patients with normal sinus node function who received VDD pacemakers were enrolled into the study and were followed up for a median duration of 33 months.

Second recurrence of familial cardiac myxomas in atypical locations.

Recurrence rates reported for cardiac myxomas are 4% to 7% for sporadic cases and 10% to 21% for familial cases. Although recurrence rates are high, second recurrences are rare. Familial cardiac myxomas in a mother and daughter are reported, both of whom had their second recurrences within six years.

Acute pulmonary oedema during cardiac resynchronization therapy device implantation: management with the activation of intra-aortic balloon pump.

In this report, we present the case of two patients who experienced the development of acute pulmonary oedema during biventricular pacemaker implantation for cardiac resynchronization therapy. In both the cases, the activation of an intra-aortic balloon pump improved the clinical condition and the operation could be completed, which would otherwise have to be postponed.

Total blush score: a new index for the assessment of microvascular perfusion in idiopathic dilated cardiomyopathy.

Background: The aim of this study was to evaluate tissue-level perfusion in patients with idiopathic dilated cardiomyopathy (IDC), using the myocardial blush grade technique.

Method: The study population consisted of 26 prospectively enrolled IDC patients (15 women and 11 men; mean age, 59+/-8.8 years) and 26 control subjects (11 women and 15 men; mean age, 54.