![]() The word supraventricular means that the arrhythmia originates from the top chamber of the heart. Instead, it causes it to originate in another part of the top chamber of the heart. This prevents the heartbeat from originating in the sinoatrial node, which creates sinus rhythm. Supraventricular tachycardia can happen when there is a problem with the heart’s electrical circuit or a heartbeat originates in the atrium outside of the sinus node. Learn more about the types of sinus tachycardia here. It could be the result of a nerve-signaling problem in the heart. Inappropriate sinus tachycardia, which is rare, occurs when the heart rate increases for no apparent reason. ![]() Sinus tachycardia occurs when the heart rate increases due to expected reasons, such as during exercise, if a person is feeling anxious, or during periods of dehydration. In sinus tachycardia, the heart rate increases but continues to beat properly in the normal rhythm. The sections below will look at some of these in more detail. Learn about what a person’s heart rate should be here. Tachycardia means that an adult’s heart rate is over 100 beats per minute (bpm). Share on Pinterest Daniel Garrido/Getty Images
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