![]() Types of supraventricular arrhythmia can include: They can cause a sudden rapid heartbeat of over 100 beats per minute that typically lasts a few minutes but that may last longer, including up to several hours, according to the UK National Health Service (NHS). SVTs are usually identified by a burst of rapid heartbeats that may begin and end suddenly. Supraventricular tachycardia (SVT) includes different forms of arrhythmias that begin above the ventricles. Supraventricular arrhythmias, or atrial arrhythmiasĪtrial arrhythmias, also known as supraventricular arrhythmias, begin in the atrium or upper chamber of the heart above the ventricles. This can cause sudden cardiac arrest and death without immediate treatment. When you have this kind of arrhythmia, your ventricles can’t pump blood into your body, and your heart rate drops quickly. These erratic electrical impulses, sometimes triggered by a heart attack, cause your heart’s ventricles to quiver. Ventricular fibrillation (VF) involves sudden, rapid, irregular, and chaotic heartbeats in the ventricle. It may also lead to more serious ventricular arrhythmias, such as ventricular fibrillation. VT is dangerous when it lasts longer than a few seconds. It can cause a heart rate of 100 beats per minute or higher with the rhythm originating in the bottom chamber of the heart. Ventricular tachycardia (VT) typically occurs in people who have had heart disease or heart-related issues, like coronary artery disease or a prior heart attack, but can occur in those with structurally normal hearts.
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