نتایج جستجو برای: atrioventricular node dysfunction
تعداد نتایج: 334528 فیلتر نتایج به سال:
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. Meth...
We characterized /3-adrenoceptor subtypes in the atrioventricular node of the rat heart by quantitative autoradiography. Consecutive 16-/xm-thick sections from single rat hearts containing the atrioventricular node were incubated with increasing concentrations of [I]iodocyanopindolol. After exposure to [H]Ultrofilm, optical densities corresponding to the atrioventricular node were determined by...
RATIONALE Familial sinus node and atrioventricular conduction dysfunction is a rare disorder that leads to paroxysmal dizziness, fatigue, and syncope because of a temporarily or permanently reduced heart rate. To date, only a few genes for familial sinus and atrioventricular conduction dysfunction are known, and the majority of cases remain pathogenically unresolved. OBJECTIVE We aim to ident...
the detailed anatomy and histology of the atrioventricular bundle (avb) was studied in 10 adult cats (5 males and 5 females). the trunk of the atrioventricular bundle was a direct continuation of the atrioventricular node (avn) with no sharp line of demarcation between node and the bundle. the avb of the male cats measured 6.24 mm in length, 0.27 mm in width and 0.65 mm in thickness, while in t...
We characterized beta-adrenoceptor subtypes in the atrioventricular node of the rat heart by quantitative autoradiography. Consecutive 16-microns-thick sections from single rat hearts containing the atrioventricular node were incubated with increasing concentrations of [125I]iodocyanopindolol. After exposure to [3H]Ultrofilm, optical densities corresponding to the atrioventricular node were det...
Sinus node dysfunction, previously unreported in girls, occurred in a 13-year-old girl who required permanent pacemaker implantation because of recurrent syncopal attacks. In addition to periodic sinus arrest, the presence of significant atrioventricular conduction disturbance was also documented. Although she had had a persistent ductus arteriosus divided at an earlier age, the disturbance of ...
Introduction Complete heart block is the most common electrocardiogram (ECG) finding in patients with cardiac sarcoidosis because of the predilection of granulomatous infiltration of the basal septum or involvement of the atrioventricular nodal artery. We report a cardiac sarcoid case presenting with sinus node dysfunction and describe the utility of fluorine-18fluorodeoxyglucose positron emiss...
Cardiac sarcoidosis is an uncommon cause of cardiac arrhythmias and cardiomyopathy. We describe a case of cardiac sarcoidosis presenting as an accelerated junctional rhythm and complete atrioventricular (AV) block, without severe left ventricular (LV) dysfunction or pulmonary symptoms. Computer tomography (CT) of the chest and mediastinal lymph node biopsy confirmed the diagnosis. Dual-chamber ...
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