Potapenko PI, Kapustin AI, Strukov VV. Vrach Delo 1991 Aug;(8):44-7. The efficiency was studied of transesophageal electrocardiostimulation of the left ventricle (TEESLP) in controlling attacks of atrial fibrillation in patients with cardiac insufficiency as well as its association with preliminary administration of cordaron. Treatment was carried out in 19 patients. After (TEESLP) the attack was controlled in 15 patients (76.3%). In cases where primary TEESLP was inefficient TEESLP was repeated after administration of cordaron in doses that do not inhibit the contractile capacity of the myocardium. It proved possible to control the paroxysm in 93% where primary TEESPL failed. There was relationship between the sizes of the left atrium and the result which permits to predict the efficacy of this method.