About every 34 seconds, someone in the United States suffers from a heart attack! Every year, tens of thousands of Americans survive heart attacks, and are able to enjoy a normal life. Heart disease is when plaque forms in the arteries that bring oxygen to the heart muscle. Symptoms of heart disease, which can be a warning of an impending heart attack, are when ordinary physical activity causes you to experience: Undue fatigue. Palpitations which are the sensation that your heart is skipping a beat or ‘racing’, beating too rapidly. Dyspnea which is difficult or labored breathing. Angina pain which is either classified as stable (chest pain with exertion only).