The value of heart rate variability, ambulatory electrocardiographic (ECG) variables and the
signal-averaged ECG in the prediction of arrhythmic events (sudden death or life-threatening …

QT Dispersion. QT dispersion is defined as the difference in QT interval between the different
leads of the surface 12‐lead ECG. This may provide an indirect measure of the underlying …

The rate of QT adaptation to abrupt changes in pacing rate was studied in seven patients with
newly diagnosed complete heart block with a ventricular escape rate of less than 40 beats·…

It has been suggested that QT dispersion recorded on the surface electrocardiogram may be
a predictor of arrhythmic events in patients with congenital QT prolongation. To evaluate this…

A new algorithm (St. George's algorithm), based on the polarity and morphology of QRS
complexes rather than delta waves, was developed for localizing accessory pathways to 1 of 9 …

OBJECTIVES.: This study investigated the efficacy and tolerability of low energy shocks for
termination of atrial fibrillation in patients, using an endocardial electrode configuration that …

In a proportion of patients with left free wall accessory connections, preexcitation is apparent
only during atrial arrhythmias or atrial pacing (latent preexcitation). These patients may be …

Univariate analysis has identified several criteria that aid the differential diagnosis of broad
complex tachycardia. In this study of 102 consecutive patients multivariate analysis was …

Background—Digoxin is commonly prescribed in symptomatic paroxysmal atrial fibrillation (AF)
but has never been evaluated in this condition. Methods and Results—From a …

Objective—A comparison of the efficacy of verapamil, sotalol, and flecainide to suppress
right ventricular tachycardia (VT) in patients with a clinically normal heart. Design—Patients …