| ACO | acute coronary occlusion; alert, cooperative, and oriented; anodal closure odor |
|---|---|
| ACx | anomalous circumflex [coronary artery] |
| ALCA | anomalous left coronary artery |
| ALCAPA | anomalous origin of left coronary artery from pulmonary artery |
| ASCAD | atherosclerotic coronary artery disease |