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).
At the root of the cause for heart attacks is a disease called âarteriosclerosis,â which is the accumulation of âplaqueâ or âcrudâ (cholesterol, fatty deposits, and other substances) on the inner lining of artery walls.This buildup narrows arteries until they become so clogged, blood cannot flow through.t the root of the cause for heart attacks is a disease called âarteriosclerosis,â which is the accumulation of âplaqueâ or âcrudâ (cholesterol, fatty deposits, and other substances) on the inner lining of artery walls. This buildup narrows arteries until they become so clogged, blood cannot flow through.