cardiac rhabdomyomas are the most common primary cardiac tumors in children. these tumors are generally asymptomatic, although they may be associated with neonatal tuberous sclerosis complex. despite the fact that thyroid dysfunction rarely occurs in tuberous sclerosis, papillary adenomas (hamartomas) of the thyroid gland have been reported in a number of autopsies. herein, we present the case ...

Sinus node dysfunction in patients after repair of the secundum atrial septal defect has been ascribed to surgical damage. We studied 15 consecutive patients with secundum atrial septal defect before operative intervention. Noninvasive testing included 34-hour electrocardiographic monitoring and a standard 13-lead ECG. Intracardiac electrophysiologic techniques included corrected sinus node rec...

this study was conducted on the atrioventricular node (avn) and atrioventricular bundle (avb) of fivefour-month-old ovine fetuses. the histological structure of these components was studied by routinehistological techniques and use of specific staining methods. the avn was caudally located adjacent to theroot of the aorta. it was almost spherical in shape and consisted of twisty cells. the node...

Cardiac rhabdomyomas are the most common primary cardiac tumors in children. These tumors are generally asymptomatic, although they may be associated with neonatal tuberous sclerosis complex. Despite the fact that thyroid dysfunction rarely occurs in tuberous sclerosis, papillary adenomas (hamartomas) of the thyroid gland have been reported in a number of autopsies. Herein, we present the case ...

introduction: intranodal pathways of atrioventricular (av) node play a vital role in the delay of conduction time in response to various atrial inputs. the present study was aimed to determine the frequency-dependent electrophysiological properties of concealed slow pathway according to a functional model of isolated rabbit atrioventricular node preparation after fast pathway ablation. methods:...

Electrophysiological data consistent with atrioventricular nodal dysfunction were obtained in 10 out of 19 patients with progressive systemic sclerosis (scleroderma). Conducting system studies were carried out in a further seven patients with progressive systemic sclerosis. In each the proximal portion of the atrioventricular node was consistently found to be smaller and more slender. It is pos...

background: ventriculoatrial (va) conduction has an important role in the initiation and maintenance of some arrhythmias. the aim of this study was to evaluate whether clinical and electrophysiological parameters of atrioventricular (av) conduction can predict va conduction. methods: detailed demographic, electrocardiographic, and echocardiographic data were recorded in 54 consecutive patients ...

Method From 1989 to 2013, 44 patients (15 neonates) underwent pacemaker implantation within the first year of life. The mean age and weight were 101.2 ± 97.2 days and 4.8 ± 1.8kg at the time of pacemaker implantation. The Indication for pacemaker implantation were postoperative atrioventricular block in 23, congenital atrioventricular block in 16, sinus node dysfunction in 4, and myocarditis in...

inus node disease, atrioventricular conduction disease, atrial brillation, and stroke all have markedly increased incidence in he elderly. Thus, there is frequently an overlap of these onditions. Many patients with pacemakers develop atrial brillation (1–3), and many patients with atrial fibrillation have oncomitant sinus node dysfunction and receive pacemakers. his is not surprising in that th...