| If the coronary artery blockage causing angina is not reversed and blood flow is not restored either spontaneously or with treatment, the vessel may become permanently blocked and the heart muscle supplied by that artery may die, resulting in a heart attack (acute myocardial infarction). Decreased blood flow to the heart muscle can also cause irregular heartbeat (arrhythmia) that can prevent the heart muscle from pumping blood effectively. Complications following acute heart attack can include circulatory shock, heart failure, fluid in the lungs (pulmonary edema), blood clot in the lungs (pulmonary embolism), and recurrent myocardial infarction. |
Source: Medical Disability Advisor