title: Extreme protective action of coronary collateral vessels in complete occlusion of the left main coronary artery.
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000503:physiopathology*; D003097:Collateral Circulation; D003326:Coronary Circulation; D004562:Electrocardiography; D006801:Humans; D008297:Male