Atherosclerosis is a condition in which a material called plaque builds up on the inner walls of the arteries. This can happen in any artery, including the coronary arteries. The coronary arteries carry oxygen-rich blood to your heart. When atherosclerosis affects the coronary arteries, the condition is called coronary artery disease (CAD).
Development of atherosclerosis (from: Greenland P, Gidding SS, Tracy RP. Commentary: lifelong prevention of atherosclerosis: the critical importance of major risk factor exposures. Int J Epidemiol 2002; 31:1129-34):
An atherosclerotic plaque obstructs blood flow as shown in this picture (from: http://www.nhlbi.nih.gov/health/dci/Diseases/Atherosclerosis/Atherosclerosis_WhatIs.html):
World-famous musician Barry Manilow is one of the more than 2.5 million Americans living with Atrial fibrillation (AF, or AFib). 
Poor nutrition and lack of exercise may increase your risk of High Cholesterol, High Blood Pressure, Diabetes, Obesity, Heart Disease, and Stroke.
