25% of all heart attacks are silent, without any symptoms.

A silent heart attack is every bit as terrifying as it sounds. Not all heart attacks are accompanied by the usual signs and symptoms. In fact, 25% of heart attacks are silent, meaning they occur with either no symptoms or negligible symptoms. However, even though they don’t come with obvious symptoms, silent heart attacks are every bit as dangerous as any other heart attack. All heart attacks, including silent ones, can damage the heart and cause scarring.

Sometimes, a patient will go to the doctor complaining of fatigue and other vague symptoms, and the doctor will perform tests and discover the patient actually suffered a heart attack weeks or even months ago without even realizing it. Some people who have silent heart attacks present with subtle, general symptoms like indigestion, muscle soreness, fatigue, or flu-like illness.