Abstract

Coronary blood flow velocity measurements during protected left main coronary angioplasty have not been previously reported. In a patient undergoing angioplasty of left main and circumflex vessels with prior coronary artery bypass grafting, distal coronary flow velocity was measured before, during, and after angioplasty, and again after stenting of the circumflex stenosis. The data demonstrated preserved coronary flow during left main occlusion in this individual and provided new observations that highlight the limitations of our understanding of myocardial blood flow in complex circumstances of high risk angioplasty and interventions following bypass graft surgery.

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