[Coronary blood outflow along parasinoidal pathways in the left heart (possible pathogenesis of angina attacks with normal coronary circulation)].
Acute experiments on isolated cat hearts were made to study the involvement of the parasinus pathways of the left heart in the blood outflow from the myocardium. The magnitude of the blood outflow to the left heart via the parasinus pathways may vary within a wide range, depending on heart function conditions. During heart work normalization, the specific values of the outflow to the left heart are minimal, amounting on an average to 10%, those under heart perfusion with venous blood to 39%, reaching 64% after 30 minutes of ischemia. The data obtained indicate that the assessment of myocardial supply by the blood inflow to the coronary arteries cannot be regarded as adequate and that angina pectoris attacks may occur because of the shunt drainage of the coronary blood, by-passing the myocardial capillaries.
D000787:Angina Pectoris / Q000503:physiopathology*; D000818:Animals; D002415:Cats; D003326:Coronary Circulation; D066298:In Vitro Techniques
Sbros koronarnoĭ krovi po parasinusnym putiam v levye otdeli serdtsa (vozmozhnyĭ patogenez pristupov stenokardii pri normal'nom koronarnom krovotoke).