Fig. 1From: Post-challenge insulin concentration is useful for differentiating between coronary artery disease and cardiac syndrome X in subjects without known diabetes mellitusFlow chart of the study enrollment protocol. CAD: coronary artery disease; CAG: coronary angiogram; CSX: cardiac syndrome X DM: diabetes mellitus; HbA1C: glycated hemoglobin; LV: left ventricle; OGTT: oral glucose tolerance test; PCI: percutaneous coronary intervention Back to article page