Electrocardiographic changes subsequent to artificial ventricular depolarization.

Electrocardiographic changes after cardioversion of ventricular arrhythmias.

To evaluate rhythm and QRS-T changes after cardioversion of induced ventricular arrhythmias, 56 patients underwent continuous three-lead and serial 12-lead electrocardiographic monitoring for 15 min after 77 cardioversions. Fifty patients were cardioverted externally and nine internally with an implanted automatic cardioverter/defibrillator. Initial energy for external cardioversion was 200 Wse...

Electrocardiographic identification of abnormal ventricular depolarization and repolarization in patients with idiopathic ventricular fibrillation.

OBJECTIVES We sought to gain more insight into the arrhythmogenic etiology of idiopathic ventricular fibrillation (VF) by assessing ventricular depolarization and repolarization properties by means of various electrocardiographic (ECG) techniques. BACKGROUND Idiopathic VF occurs in the absence of demonstrable structural heart disease. Abnormalities in ventricular depolarization or repolarizat...

Electrocardiographic changes during hemodialysis with the artificial kidney.

IN A PREVIOUS communication' we reported that hemodialysis with the artificial kidney consistently corrects acidosis, hyperpotassemia, and hypocalcemia. We have observed, as have others,2 3 that the patient with heart disease receiving digitalis may manifest electrocardiographic changes of "digitalis effeet" and toxicity during repair of fluid and electrolyte imbalance. The management of digita...

Electrocardiographic Changes Due to Trauma.

Premature Ventricular Depolarization

ADIFFERENCE has been observed in certain instances between the onset of QRS in intracavitary and surface limb leads. Simultaneous tracings demonstrate that when premature ventricular depolarization exists the early rapid growth in magnitude of potential recorded by intracavitary leads may be nearly or totally inapparent in surface leads. Following premature depolarization changes occur in intra...