[Mechanism of the antiarrhythmic effect of laser irradiation]

Acute experiments were performed to study the role of afferent impulses from the heart receptors which pass by different vagal fibers during intraatrial laser irradiation. Double laser irradiation of the right atrium seemed more effective than a single one as to decreasing ventricular arrhythmias during cardiac ischemia. It is shown that the antiarrhythmic effect of intraatrial laser irradiation may be due to the change of the afferent information passing by myelinated vagal fibers.