[The amount of thrombocyte alpha 2-adrenoreceptors in patients with different clinical variants in the course of ischemic heart disease]. / Kolichestvo al'fa 2-adrenoretseptorov trombotsitov u bol'nykh s razlichnymi klinicheskimi variantami techeniia ishemicheskoi bolezni serdtsa.

Number of alpha-2-adrenoceptors on the thrombocyte membranes was measured with selective antagonists [H]3 yohimbine in 25 patients with ischemic heart disease (7 patients with unstable 12 with vasospastic and 6 with new onset angina pectoris) and in 16 patients without ischemic heart disease and coronary atherosclerosis (control group). The number of alpha-2-adrenoceptors in patients with unstable angina pectoris (571.0 +/- 92.9) was proved to exceed significantly that in patients with vasospastic (237.9 +/- 30.0) or new onset angina (126.2 +/- 19.3) and in the control group (200.0 +/- 22.5). The number of adrenoceptors tended to decrease during myocardial ischemia.