Mironova IIu, Liakishev AA, Kozlov SG, Sidorenko BA. Kardiologiia 1986 Nov;26(11):47-51. Anti-ischemic effect of sorbide nitrate was assessed by means of esophageal left-atrial electric stimulation in 26 coronary patients. This method is shown to be useful for objective assessment of the efficiency of antianginal drugs by acute tests in coronary patients. Repeated stimulation in the presence of sorbide nitrate treatment showed smaller ischemic ECG changes.