Perception of an occasional skipped heartbeat | |
Sudden episodes of rapid heartbeats that abruptly slow to the normal rate; often in people who have had previous episodes of rapid heartbeats | |
A constant sensation of rapid, irregular heartbeats | |
Fainting during palpitations | |
Palpitations during exercise or an emotional situation | Sinus tachycardia (the heart's normal response to stress), particularly common in healthy people Abnormal heart rhythm caused by a decrease in blood flow triggered by exercise, more common in people who have coronary artery disease or congenital heart diseases |
In people with a family history of fainting or sudden death | Brugada syndrome, congenital long QT syndrome, or inherited dilated or hypertrophic cardiomyopathy |
In people who are bleeding, have a fever, are in pain, or have lost fluids (as may result from vomiting or diarrhea) | |
Intolerance of heat, weight loss, bulging eyeballs, and tenderness and/or swelling in the front of the neck | Sinus tachycardia or atrial fibrillation due to hyperthyroidism |