Arrhythmia
Heart and circulation
There are a number of different types of arrhythmia. Most arrhythmias that come from the top of your heart (supraventricular or atrial) can cause symptoms but aren't life threatening. Arrhythmias that arise from your ventricles (ventricular) are more serious and can sometimes be fatal.
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Supraventricular tachycardia (SVT) is when your heart beats too fast, usually at a rate of about 130 to 250 beats per minute. SVT is a type of arrhythmia (abnormal heart rhythm)....
Ventricular tachycardia causes your heart to beat too fast, usually at a rate of about 120 to 200 beats per minute. Ventricular tachycardia is a type of arrhythmia (abnormal heart...