An arrhythmia similar to A-Fib in which the heart beats fast (100 to 240 beats per minute). SVT usually begins and ends suddenly. SVT often begins in childhood or adolescence. It is commonly caused by a variation in the electrical system of the heart. It is usually not dangerous, but can cause a drop in blood pressure and lightheadedness.
supraventricular tachycardia: rapid heart rhythms that originate in the atria or upper chambers of the heart
The most common type of SVT is atrial fibrillation, an irregular and rapid heartbeat in the upper chambers of the heart (or atria).
A rapid heart beat that originates in the upper chambers of the heart. Curable condition by RF catheter ablation.
A tachycardia originating from an impulse arising in any portion of the atrium, the AV node, or the bundle of His.
A tachycardia originating in the atria, AV node, or His Bundle.
A fast arrhythmia (over 100 beats per minute) that originates an electrical impulse at the top of the heart. There are many types of SVTs, each named for the generator of the abnormal heart rhythm.
A type of arrhythmia that affects the upper chambers of the heart and causes an abnormally fast heart rate. If left untreated, it can cause palpitations and fainting.
A too-rapid heart beat of 140-180 beats per minute. It can persist for several minutes or several days. It occurs when the tissue above the ventricles generates impulses at a faster rate than the usual pace maker of the heart, the sinoatrial node.
A tachycardia that originates from the supraventricular region. Supraventricular tachycardias are usually pathologic tachycardias and include AV and AV nodal reentry tachycardia. Abbreviated SVT.
A supraventricular tachycardia (SVT) is a rapid rhythm of the heart in which the origin of the electrical signal is either the atria or the AV node. These rhythms require the atria or the AV node for either initiation or maintenance. This is in contrast to ventricular tachycardias, which are tachycardias that are not dependent on the atria or AV node.