Transesophageal Cardioversion and Defibrillation

Relation of parameters of frequent transesophageal electric stimulation of the atria during the treatment of atrial flutter and electrophysiologic characteristics of the myocardium.

Zubrin IuV. Kardiologiia 1989 Jul;29(7):46-9. After arresting paroxysms with frequent transesophageal cardiostimulation (TECS), 20 patients with coronary heart disease accompanied by episodes of Type 1 atrial flutter (AF) were studied by using a technique of intracardiac electrophysiological examination. The length of the atrial cycle in AF was found to correlate with that of successful TECS (r = 0.83). The correlation increases when a difference of atrial functional and effective refractory periods is subtracted from the length of the atrial cycle in tachycardia (r = 0.92). The equations of simple and multiple linear regression were derived, which defined the optimal frequency parameters of stimulation with a sufficient accuracy to stop Type I AF episodes. The efficacy of frequent TECS in arresting 324 spontaneous AF episodes was 92.9%.

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