Electrocardiograms and surgical data from 12 patients with complete atrioventricular canal defects and 24 patients with ostium primum defects were evaluated before and after open heart surgery in order to document the incidence of postoperative right bundle branch block. The use and precise location of septal sutures utilized for repair were specifically noted in order to assess their possible ...

A 17-month-old Japanese girl with an idiopathic acute myocarditis had symptoms of vomiting, slight fever, and liver enlargement, but no edema. Clinical diagnosis of acute myocarditis was not made until she had Stokes-Adams syndrome and electrocardiogram revealed complete atrioventricular block on the day of death. At autopsy, idiopathic acute myocarditis was detected diffusely in the right and ...

The developmental appearance and spatial distribution pattern of gap junctions were studied in prenatal and adult rat hearts. Gap junctions were visualized immunohistochemically with an antibody raised against a unique cytoplasmic epitope of connexin43, and the spatial distribution pattern was determined by three-dimensional reconstruction. The results demonstrate that from embryonic day 13 onw...

The Taussig-Bind group of hearts is that group in which the aorta emerges completely from the right ventricle, unrelated to the position of the ventricular septal defect (VSD), while the pulmonary trunk emerges at varying degrees from the right ventricle related to the location of the VSD. Several types of surgical procedures involve the VSD in these hearts. The conduction systems in six of the...

Retrospective analysis was performed to determine the likely cause of death in six patients who died suddenly 1-9 years after repair of tetralogy of Fallot. The integrity of the atrioventricular conduction system and myocardium was examined in three hearts at necropsy. Two of three patients who complained of palpitation or syncope had frequent premature ventricular complexes on routine ECGs. Al...

OBJECTIVE To analyze the incidence of intraventricular and atrioventricular conduction defects associated with acute myocardial infarction and the degree of in hospital mortality resulting from this condition during the era of thrombolytic therapy. METHODS Observational study of a cohort of 929 consecutive patients with acute myocardial infarction. Multivariate analysis by logistic regression...

Permanent His bundle pacing (HBP) is a physiological alternative to right ventricular pacing. Acute injury to the His bundle can occur during permanent HBP in the form of transient or permanent bundle branch blocks. Observations of mechanical injury to the His bundle during HBP lead fixation and electrophysiological response to HBP provides additional mechanistic insights into the pathology of ...

Electrophysiologic studies were performed in a patient who had an apparently uncomplicated complete trifascicular block. His bundle recordings revealed atrioventricular dissociation with: 1) an atrial rate of 58 beats/min, 2) an idioventricular escape rate of 45 beats/min, and 3) nonparoxysmal junctional tachyeardia (His bundle rhythm) at a rate of 65-85 beats/min. The latter arrhythmia was ele...

His bundle recordings were obtained in 121 patients with chronic bundle branch block and the patients were followed for a mean period of 18 months. Seventy-nine patients had an infranodal conduction time (H-Q) less than 70 msec while 42 had H-Q greater than or equal to 70 msec. There was no significant difference in mean age, smoking history, diabetes, syncope, dizziness, blood pressure, and se...