نتایج جستجو برای: rvot
تعداد نتایج: 491 فیلتر نتایج به سال:
conclusions the right ventricular outflow tract palliation in children with cyanotic chd leads to long-term favorable outcome regarding improvement in oxygen saturation, increase in z score of both left and right pulmonary arteries and also considerable decrease in spell. also, death and complications are rare following rvot palliation. background the right ventricular outflow tract (rvot) pall...
OBJECTIVES [corrected] The aim of this study was to determine whether noncontact mapping is feasible in the right ventricle and assess its utility in guiding ablation of difficult-to-treat right ventricular outflow tract (RVOT) ventricular tachycardia (VT). BACKGROUND In patients without inducible arrhythmia, RVOT VT may be difficult to ablate. Noncontact mapping permits ablation guided by a ...
زمینه و هدف: امروزه تعداد قابل توجهی از بیماران قلبی نیازمند ضربان سازهای قلبی میباشند که خود عوارض متعددی از جمله نارسایی دریچهای و قلبی دارد. هدف از این مطالعه مقایسه ایجاد نارسایی دریچههای میترال(دو لتی) و تریکوسپید(سه لتی) به دنبال pacing (تحریک ضربان) از rva (نوک بطن راست) و rvot (مجرای خروجی بطن راست) میباشد. مواد و روشها: در این کارآزمایی بالینی یک سوکور 164 بیماری که به علل اختلال ...
Premature ventricular complexes (PVCs) and ventricular tachycardia (VT) in patients with structurally normal hearts originate from the right ventricular outflow tract (RVOT) in the majority of cases. In the last few decades catheter ablation of these arrhythmias has been proven to be effective. RVOT VT/PVCs may cause disabling symptoms or arrhythmia induced cardiomyopathy. However, the PVC burd...
BACKGROUND Recently, due to the detrimental effects on the ventricular function associated with right ventricular apical (RVA) pacing, right ventricular septal (RVS) pacing has become the preferred pacing method. However, the term RVS pacing refers to both right ventricular outflow-tract (RVOT) and mid-septal (RVMS) pacing, leading to a misinterpretation of the results of clinical studies. The ...
AIMS To determine whether the restrictive physiology seen in Tetralogy of Fallot (TOF) patients can be explained by fibrosis of the right ventricular (RV) outflow tract. The aetiology for restrictive RV physiology after TOF repair is not known. METHODS AND RESULTS TOF patients (n = 31, 13 girls, 10.2 years ± 2.8) were included 9.2 ± 2.9 years after total correction and examined with cardiac m...
AIMS Little is known about the optimal right ventricular (RV) pacing site in cardiac resynchronization therapy (CRT). This study compares bi-ventricular pacing at the left ventricular (LV) free wall combined with two different RV stimulation sites: RV outflow tract (RVOT+LV) vs. RV-apex (RVA+LV). METHODS AND RESULTS Thirty-three patients (32 males) with chronic heart failure, NYHA class III-I...
OBJECTIVE This study utilized Doppler ultrasonography cardiograms in patients with third-degree atrioventricular (III-AV) block to compare right ventricular apex (RVA) pacing and right ventricular outflow tract (RVOT) pacing with respect to their effects on synchronization of contraction between the two ventricles, as well as on timing of specific left-ventricular electrical and mechanical even...
BACKGROUND Termination of ventricular tachycardia (VT) by mechanical pressure has been described for fascicular and postinfarction VT. Mechanical interruption of idiopathic ventricular arrhythmias (VT/premature ventricular complexes [PVCs]) arising in the right ventricular outflow tract (RVOT) has not been described in systematic fashion. METHODS Eighteen consecutive patients (13 females, age...
INTRODUCTION The signal characteristics of intracardiac bipolar electrograms at the origin of idiopathic RVOT-VT during sinus rhythm remain unclear. OBJECTIVE The study sought to develop a novel real-time/online technique, simultaneous amplitude frequency electrogram transformation (SAFE-T), to quantify and localize the diseased ventricular substrate in idiopathic RVOT-VT. METHODS We retros...
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