- COD refers to Cause of Death as recorded by the medical examiner. OD is accidental or suicidal drug overdose. CAD is coronary artery disease. Lung refers to scores for pathologic lung findings: 1ā=ānormal lung, 2ā=āedema only, 3ā=āpneumonia, 4ā=ādiffuse alveolar damage and 5ā=āvascular thrombi. Heart refers to scores of cardiac pathologic findings: 1ā=ānormal heart, 2ā=āhypertensive cardiac disease, 3ā=āCAD, 4ā=āother cardiac causes including aortic stenosis, alcoholic cardiomyopathy and fatty infiltration. Cardiac and lung exams were not done on all cases