A lot of symptoms such as shortness of breath, lightheadedness and chest pain signal a heart attack but a common sign which one should pay attention to is sweating profusely. A lot of health experts suggests that excessive sweating could be a clear indication of a heart attack especially if the person leads a sedentary lifestyle. During a heart attack, your heart tends to slow down and becomes difficult to pump blood through the body. It actually happens when coronary artery gets blocked and this cuts off the supply of oxygen-rich blood to your heart muscle. Therefore, the body uses more energy to supply blood and cool itself down, which makes one sweat. You must visit a doctor if your experience cold sweats or sweat skin.