In an effort to standardize terminology and criteria for clinical electrocardiography, and as a
follow-up of its work on definitions of terms related to cardiac rhythm, an Ad Hoc Working …

The AV node of those mammalian species in which it has been thoroughly investigated (rabbit,
ferret, and humans) consists of various cell types: transitional cells, midnodal (or typical …

In 13 patients with atrial fibrillation, the effect of right ventricular pacing at various rates on
spontaneous RR intervals was studied. Five hundred consecutive RR intervals were recorded …

To obtain information concerning the time course and instantaneous distribution of the excitatory
process of the normal human heart, studies were made on isolated human hearts from …

This study prospectively assessed the time course, magnitude and mechanism of the
hemodynamic changes after restoration of sinus rhythm in patients with chronic atrial fibrillation (AF…

Serial autocorrelation functions and histograms of RR intervals in patients with atrial fibrillation,
with and without digitalis, at rest and during exercise, were produced by a computer. At …

Background— On the ECG, the PR interval measures the time taken by an electrical impulse
generated in the sinoatrial node to propagate from atria to ventricles. From mouse to whale, …

OBJECTIVES.: This study sought to evaluate control mechanisms of the varying left ventricular
performance in atrial fibrillation. BACKGROUND.: Atrial fibrillation is characterized by a …

In normal sinus rhythm, the atrioventricular (AV) conduction system introduces an appropriate
delay between atrial and ventricular excitation and contraction (1, 2), This delay, the AV or …

Forty years ago, we started our quest for ‘The Holy Grail’ of understanding ventricular rate
control and rhythm in atrial fibrillation (AF). We therefore studied the morphology and function …