Supraventricular tachycardia

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Supraventricular tachycardia (SVT) is an abnormally fast heart rhythm caused from improper electrical activity in the upper part of the heart.[1]

There are four main types: atrial fibrillation, paroxysmal supraventricular tachycardia (PSVT), atrial flutter, and Wolff–Parkinson–White syndrome.

Symptoms may include palpitations, feeling faint, sweating, shortness of breath, or chest pain.[2]

Supraventricular Tachycardia Media

  • Mechanisms of supraventricular tachycardias

  • Holter monitor-Imaging with start (red arrow) and end (blue arrow) of a SV-tachycardia with a pulse frequency of about 128/min.

  • A 12-lead ECG showing paroxysmal supraventricular tachycardia at about 180 beats per minute.

  • Atrial fibrillation: Red dots show atrial fibrillation activity.

  • Impulse arising in SA node, traversing atria to AV node, then entering ventricle. Rhythm originating at or above AV node constitutes SVT.

  • Atrial fibrillation: Irregular impulses reaching AV node, only some being transmitted.

References

  1. ↑ Types of Arrhythmia. NHLBI (July 1, 2011).
  2. ↑ What Are the Signs and Symptoms of an Arrhythmia?. NHLBI (July 1, 2011). Retrieved 27 September 2016.
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