[Physical reproduction of cardiac sutures. A new field of investigation in cardiology].

A new technique of physical reproduction of cardiac anatomy has been developed from volumetric data and its practical value assessed in cardiological practice. The acquisition of the volumetric data was by 3D echocardiography. Parallel and equidistant 2D views were selected from this information.

[Evaluation of sino-atrial function using the method of extrasystole induced by constant-relative premature impulses. 1. Method and normal results].

Atrial pacemaking under conditions of relative constancy (40 or 50% of the preceding cycle) enables us to calculate the immediate sino-atrial conduction time (retrograde and antegrade) (SACT). 17 patients were chosen for their normal sino-atrial function under spontaneous changes of the sinus cycle (SC). In each case, a significant inverse linear relationship was found between SACT and the corresponding SC.

[Pacemaker treatment of tachyarrhythmias by programmed rate-related interval stimulation(author's transl)].

Programmed rate-related interval stimulation proved to be a low-risk method when applied to 74 patients with drug-resistant ventricular tachycardia or runs of ventricular extrasystoles as precursors of tachycardia. Atrial flutter was converted to atrial filbrillation and sinus rhythm by atrial interval-related multiple stimulations. Tachycardias, which could not be terminated by simple or double stimulation, were successfully suppressed by sequential ventricular R-R related multiple stimulations.

[Orthorhythmic pacemaker and salvo-like cardiac stimulation. New procedure aiming at the suppression and prophylaxis of cardiac arrhythmia and the determination of electrophysiological measurement magnitudes in vivo].

The orthorhythmic pacemaker (ORPM) represents a new apprach in cardiac stimulation. The use of conventional demand pacemakers is essentially limited to the treatment of bradycardic arrhythmias. The principle of the ORPM consists in early stimulation after premature beats, taking into account the R-R interval of the preceding spontaneous beat.