نتایج جستجو برای: ventricular zone
تعداد نتایج: 264210 فیلتر نتایج به سال:
BACKGROUND The present study examined whether transplantation of adherent bone marrow-derived stem cells, termed pMultistem, induces neovascularization and cardiomyocyte regeneration that stabilizes bioenergetic and contractile function in the infarct zone and border zone (BZ) after coronary artery occlusion. METHODS AND RESULTS Permanent left anterior descending artery occlusion in swine cau...
The effect of lidocaine on re-entrant ventricular arrhythmias (RVA) was studied in dogs 3-7 days following ligation of the anterior descending coronary artery; direct recordings were made of the re-entrant pathway (RP) from the epicardial surface of the infarction zone (IZ). Lidocaine in a therapeutic dose consistently prolonged refractoriness of potentially RP(s) in the IZ and produced a highe...
A 31-year-old patient with Brugada syndrome presented at our clinic after an electrical shock from his dual-chamber implantable cardioverter-defibrillator (ICD – Biotronik Iperia), implanted in secondary prevention of sudden cardiac death (ventricular fibrillation zone > 214 bpm, detection counter 18/24; monitor ventricular tachycardia zone > 176 bpm with supraventricular tachycardia discrimina...
BACKGROUND This study aims to assess the incidence and clinical relevance of slow ventricular tachycardia (VT) and the effectiveness and/or deleterious effects of antitachycardia pacing in slow VT in implantable cardioverter-defibrillator recipients. METHODS AND RESULTS This multicenter prospective randomized study included 374 patients (326 men) without prior history of slow VT (<148 bpm) im...
AIMS Implantable cardioverter defibrillators (ICDs) have shown to reduce all-cause mortality in heart failure patients. In SCD-HeFT study, ICDs were programmed with a detection zone of ≥ 187 b.p.m. Thus, the incidence and clinical significance of slower ventricular tachycardias (VTs) in these patients remains largely unknown, though clinically important for device selection, programming, and fo...
The vocal control nucleus designated HVc (hyperstriatum ventrale, pars caudalis) of adult female canaries expands in response to systemic testosterone administration, which also induces the females to sing in a male-like manner. We became interested in the possibility of neurogenesis as a potential basis for this phenomenon. Intact adult female canaries were injected with [3H]thymidine over a 2...
OBJECTIVE To determine whether radiofrequency (RF) ablation might have a role in haemodynamically unstable ventricular tachycardia. METHODS 10 patients with a history of ventricular tachycardia producing haemodynamic collapse in whom drug treatment had failed and device therapy was rejected underwent RF ablation of ventricular tachycardia in sinus rhythm. The arrhythmogenic zone was defined o...
The time course of ventricular arrhythmias in the early period (0--30 minutes) after ligation of the left anterior descending coronary artery was studied in 41 open-chest mongrel dogs anesthetized with pentobarbital sodium (Nembutal). ECGs and seven single and composite electrograms from various regions in and around the ischemic zone were recorded throughout the experiments. Two periods of ven...
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