👉 Apoplex, also known as a heart attack, is a medical emergency that occurs when the arteries in the heart stop supplying blood to the body's organs. The symptoms of apoplexy can include chest pain or discomfort, shortness of breath, nausea, lightheadedness, and sometimes death. It is often caused by high blood pressure, which is not properly controlled, or by a blockage in one or more arteries that supply blood to the heart.