Racing Heart

 · A. Supraventricular tachycardia (SVT) is caused by an electric problem in the area above the heart's lower chambers, or ventricles. This uncommon disorder can cause the heart to beat more than twice as fast as normal—even up to times a minute. It is more common in .

 · Heart disease: Heart racing at night could be a symptom of heart disease and may be associated with coronary artery disease or a previous heart attack or other problems with the heart .

 · The sensation may be normal and predictable, like a racing heart following a good run. But heart palpitations can also be unusual heartbeats due to a change in the heart’s electrical system.

 · POTS: Lightheadedness and a racing heart Dara K. Lee Lewis, And the new symptoms he described -- sudden lightheadedness when standing up and an unusually fast heartbeat -- made me suspect a.

 · Ventricular tachycardia is a fast heart rate that starts in the heart’s lower chambers (ventricles). This type of arrhythmia may be either well-tolerated or life-threatening, requiring immediate diagnosis and treatment. The seriousness depends largely on whether other cardiac dysfunction is present and on the degree of the ventricular.

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