Effect of atrial dilatation on the tendency of atrial arrhythmias.

F. Solti, T. Vecsey, V. Kékesi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The arrhythmogenic effect of atrial dilatation was studied by electrophysiological investigations carried out on 24 dogs. Atrial distension was evoked by increasing the pressure in the right atrium (12 to 14 mm Hg) or by the balloon dilatation of the left atrium. Programmed electrical stimulation of the heart was used for the electrophysiological investigations. In addition to the superficial ECG leads also atrial and ventricular epicardial electrograms were obtained for the ECG recording. Acute atrial dilatation led to shortening of the atrial refractory period, whereas neither impulse conduction of the heart, nor pacemaker activity of the sinus node exhibited any alteration. Atrial dilatation resulted in pathological atrial irritability, and early or frequent atrial stimulation caused atrial tachycardia of shorter (non sustained) or longer (sustained) duration. Repetitive atrial extrasystoles in response to early stimuli could also frequently be observed during atrial dilatation. The obtained results indicate that atrial dilatation is arrhythmogenic and may lead to the development of atrial tachycardia.

Original languageEnglish
Pages (from-to)49-55
Number of pages7
JournalActa Physiologica Hungarica
Volume74
Issue number1
Publication statusPublished - 1989

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Cardiac Arrhythmias
Dilatation
Heart Atria
Tachycardia
Electrocardiography
Atrial Premature Complexes
Sinoatrial Node
Electric Stimulation
Dogs
Pressure

ASJC Scopus subject areas

  • Physiology

Cite this

Effect of atrial dilatation on the tendency of atrial arrhythmias. / Solti, F.; Vecsey, T.; Kékesi, V.

In: Acta Physiologica Hungarica, Vol. 74, No. 1, 1989, p. 49-55.

Research output: Contribution to journalArticle

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