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Paroxysmal supraventricular tachycardia (PSVT) is a type of supraventricular tachycardia, named for its intermittent episodes of abrupt onset and termination. [3] [6] Often people have no symptoms. [1] Otherwise symptoms may include palpitations, feeling lightheaded, sweating, shortness of breath, and chest pain. [2] The cause is not known. [3]
Supraventricular tachycardia (SVT) is an umbrella term for fast heart rhythms arising from the upper part of the heart. [2] This is in contrast to the other group of fast heart rhythms – ventricular tachycardia, which start within the lower chambers of the heart. [2]
Unstable means that either important organ functions are affected or cardiac arrest is about to occur. [10] Stable means that there is a tachycardia, but it does not seem an immediate threat for the patient's health, but only a symptom of an unknown disease, or a reaction that is not very dangerous in that moment.
Rarely, cardiac arrest may occur. [1] The most common type of irregular heartbeat that occurs is known as paroxysmal supraventricular tachycardia. [1] The cause of WPW is typically unknown and is likely due to a combination of chance and genetic factors. [2]
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Ventricular tachycardia (V-tach or VT) is a cardiovascular disorder in which fast heart rate occurs in the ventricles of the heart. [3] Although a few seconds of VT may not result in permanent problems, longer periods are dangerous; and multiple episodes over a short period of time are referred to as an electrical storm.