Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway.
Coronary artery disease. The most common underlying cause of heart attack is atherosclerosis, a condition in which a fatty substance called plaque builds up on the inside walls of blood vessels. When this occurs in the coronary arteries, it's known as coronary artery disease (CAD).
Heart Attack. A heart attack may cause a low pulse and high blood pressure. A heart attack is characterized by insufficient oxygen getting to the heart due to blocked blood vessels. Also known as a myocardial infarction, the heart muscle can either become damaged as a result or the heart muscle can die. heart attack may cause a low pulse and high blood pressure. A heart attack is characterized by insufficient oxygen getting to the heart due to blocked blood vessels.