About 20% of heart attack victims have a period of relative calm before the attack, a period that often goes unnoticed, and many survivors say afterward that they felt strange in their bodies in the hours, days, or even weeks before the heart attack. Sign #1: Severe fatigue after a brisk walk, so fatigued that you don’t even have the strength to straighten up. Fatigue is not limited to one part of the body, but is generalized. If you feel severe fatigue like never before, you need to be alert to heart disease! Sign 2: Some heart attack patients experience shortness of breath and gasping for air in addition to the common symptoms; this breathlessness is often referred to as not having enough breath. This wheezing is often overlooked, especially by older people with lung disease. Sign #3: Forearm and shoulder pain. Although the left arm and shoulder are most commonly affected, in severe cases it can also radiate to the right arm, although pain on only one side of the right arm is extremely rare. This must be differentiated from cervical spondylosis. Signs four: some people have suffered from stomach problems, so it is easy to stomach problems and heart disease caused by stomach discomfort mixed up, heart disease caused by stomach pain will rarely appear colic and severe pain, pressure pain is not often, just a kind of stuffy, bloated feeling! Sign 5: There are a few angina patients who have an attack that manifests itself as a toothache. When a toothache occurs suddenly, especially with chest tightness. Discomfort or profuse sweating, you should consider whether an angina attack and deal with it promptly.