[Collateral coronary blood circulation and its role in the mechanism of the anti-ischemic (antianginal) action of pharmacologic preparations]. 
On the basis of recent literature data the review gives characterization of collateral coronary blood circulation, emphasizes its role in protection of the myocardium against ischemic damage.  Particular attention is given to the involvement of collateral coronary blood circulation in the mechanism underlying the anti-ischemic effect of the main groups of antianginal agents (nitroglycerin, beta-adrenoblockers, calcium antagonists, etc.).