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Tachycardia - Symptoms and causes - Mayo Clinic Rapid, chaotic electrical signals cause the lower heart chambers to quiver instead of squeezing in a coordinated way Most people with this type of irregular heart rhythm have heart disease or have had a serious injury, such as being struck by lightning
Atrial tachycardia - Symptoms and causes - Mayo Clinic Overview Atrial tachycardia is an irregular heartbeat, called an arrhythmia It's a type of supraventricular tachycardia During an atrial tachycardia episode, the heart beats more than 100 times a minute Then it returns to a heart rate of around 60 to 80 beats a minute An episode may start slowly, or it may start suddenly and quickly
Supraventricular tachycardia - Symptoms and causes - Mayo Clinic Supraventricular tachycardia (SVT) is an irregularly fast or erratic heartbeat It occurs when faulty electrical signaling in the heart set off a series of early beats in the upper chambers of the heart
Tachycardia - Diagnosis and treatment - Mayo Clinic The goals of tachycardia treatment are to slow a rapid heartbeat and to prevent future episodes of a fast heart rate If another health condition is causing tachycardia, treating the underlying problem may reduce or prevent episodes of a fast heartbeat
Heart arrhythmia - Symptoms and causes - Mayo Clinic Rapid, chaotic electrical signals cause the lower heart chambers to quiver instead of squeezing in a coordinated way This serious problem can lead to death if a regular heart rhythm isn't restored within minutes
Heart palpitations - Symptoms causes - Mayo Clinic Arrhythmias might cause a very fast heartbeat (tachycardia), an unusually slow heartbeat (bradycardia), a heartbeat that varies from a typical heart rhythm or a combination of the three