Influence of electrolyte abnormalities on interlead variability of ventricular repolarization times in 12-lead electrocardiography.

Increased QT dispersion (QT(d)) has been associated with increased risk for ventricular arrhythmias. Pathologic extracellular electrolyte concentrations may result in ventricular arrhythmias. The aim of this study was to evaluate the effect of electrolyte abnormalities on QT(d).

Prostaglandin E1 : electrophysiological safety in patients with congestive heart failure and peripheral arterial occlusive disease. The Alprostadil Investigators.

Prostaglandin E ( 1 ) (PGE ( 1 ) ), the active ingredient of the drug alprostadil-alpha-cyclodextrin, has been effective in mitigating the clinical manifestations of peripheral arterial occlusive disease (PAOD). PGE ( 1 ) often is administered to patients with the potential for developing serious arrhythmias, presenting potential safety hazards if the drug caused or potentiated arrhythmias. However, PGE ( 1 ) has antiadrenergic properties and, theoretically, might have an antiarrhythmic action.

Importance of sympathetic innervation in the positive inotropic effects of bradykinin and ramiprilat.

Isolated rat left atria or right ventricular strips were electrically stimulated at a constant frequency. The amplitude of twitch contractions, thus elicited, rose as a function of stimulation intensity because of increases in the evoked release of sympathetic catecholamines. Bradykinin had no effect on contractile force in preparations paced at a minimal intensity (threshold).