Electrophysiological and pathohistological studies on sinus nodal and intra-atrial reentry tachycardia.

1 human case (out of 3 with induced sustained sinus nodal reentry tachycardia [SNRT]) studied pathohistologically, 12 adult mongrel dogs, and an additional clinical case with transition between intra-atrial reentry tachycardia (ART) and atrial flutter (AF)

In the animal model: injection of agar gel into the right coronary artery via catheter to induce right ventricular and right atrial infarction, followed by right atrial premature stimulation 2 weeks later

Pathohistological changes in the sinus node and surrounding atrial muscle, and electrophysiological induction of SNRTsurrogate