SUMMARY Ten patients with the electrocardiographic diagnosis of atrial flutter were investigated by exploration with electrodes within the esophagus and the right atrium. The records obtained were studied in regard to the timing of the intrinsic deflection and the contour of the atrial waves, as recorded at various sites. In four patients, atrial activation progressed in sequence cephalad in th...

A further mechanism of escape-capture bigeminy is described, viz, blocked atrial extrasystoles.

Lower loop re-entry (LLR) flutter is a rare type of atypical right atrial flutter. Most of the reported cases occurred in association with typical flutter patterns as a transient arrhythmia. Our case is unique in the fact the LLR was sustained and persisted independently.

Two patients known to have coronary artery disease died suddenly outdoors while active. Neither had symptoms or signs of acute myocardial infarction. They were being monitored by continuous tape recording of the electrocardiogram at the time of death. In one patient the cause of death was cardiac arrest, preceded by bigeminy and multiform ventricular ectopic beats, in the other ventricular fibr...

Minimally invasive atrial fibrillation surgery (MIAFS) has become a well established and increasingly used option for managing patients with stand-alone arrhythmia. Pulmonary veins (PVs) isolation continues to be the cornerstone of ablation strategies. Indeed, in most cases, atrial fibrillation (AF) is triggered in or near the PVs. Nevertheless, ectopic beats initiating AF may occasionally aris...

Experiments were performed on open-chest anesthetized dogs to determine the quantitative effects of autonomic nerve stimulition or pacemaker activity and conduction. The lead II electrocardiogram together with bipolar electrograms were recorded from the atria, the His bundles, and the ventricles. The vagi or the stellate gangba were stimulated in dogs which exhibited either sinus rhythm, ectopi...

Experiments were performed on open-chest anesthetized dogs to determine the quantitative effects of autonomic nerve stimulition or pacemaker activity and conduction. The lead II electrocardiogram together with bipolar electrograms were recorded from the atria, the His bundles, and the ventricles. The vagi or the stellate gangba were stimulated in dogs which exhibited either sinus rhythm, ectopi...

In 20 anesthetized open-chest dogs, epicardial electrograms were recorded from ischemic and nonischemic zones of the left ventricle during acute occlusion of the left anterior descending artery. The average time to onset of ventricular tachycardia during atrial pacing (150-200 beats/min) was 4 min, 18 sec. In 18 dogs, ventricular ectopic beats were induced in normal and ischemic zones after eve...