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...

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:...

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 ...

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 ...

Introduction: Developmental changes in atrioventricular nodal conduction time and refractoriness have been shown in several studies. Prevalence of atrioventricular nodal reentrant tachycardia (AVNRT) is clearly age-dependent. The purpose of this study was to determine developmental changes of basic and frequency-dependent electrophysiological properties of the atrioventricular node (AV-node)...

Introduction: Recent studies have shown acute cardioprotective effects of cyclosporine. The aim of the present study was to determine the protective role of cyclosporine on the model simulated the rotational nodal arrhythmia (AVNRT) by using extracellular field potential recordings of isolated atrioventricular-node (AV-node) of rabbit. Methods: This study was performed on isolated double-per...

introduction: recent studies have shown acute cardioprotective effects of cyclosporine. the aim of the present study was to determine the protective role of cyclosporine on the model simulated the rotational nodal arrhythmia (avnrt) by using extracellular field potential recordings of isolated atrioventricular-node (av-node) of rabbit. methods: this study was performed on isolated double-perfus...

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...