In simple words: Supraventricular tachycardia (SVT) is a condition where your heart beats very fast. The fast heartbeat starts in the upper chambers of your heart (atria) or the area between the upper and lower chambers (AV node). It's like an electrical short circuit that makes your heart race.

Supraventricular tachycardia (SVT) is a rapid heart rate that originates above the ventricles, specifically in the atria or atrioventricular (AV) node. It is characterized by a heart rate greater than 100 beats per minute, often with abrupt onset and termination. This condition encompasses various rhythm disturbances including atrial tachycardia, AV nodal reentrant tachycardia (AVNRT), AV reentrant tachycardia (AVRT), and junctional tachycardia.

Example 1: A 25-year-old patient presents to the emergency department with palpitations, shortness of breath, and dizziness. An ECG confirms SVT, and the patient is treated with adenosine, successfully converting the rhythm to normal sinus rhythm., A 45-year-old patient with a history of hypertension experiences recurrent episodes of rapid heart rate.After diagnostic testing, including an electrophysiology study, the diagnosis of AVNRT is confirmed, and catheter ablation is performed., A 60-year-old patient with a history of heart attack develops SVT during recovery.The patient is managed with medication to control the heart rate and prevent further complications.

Documentation should include symptoms, ECG findings, onset and duration of the tachycardia, any associated conditions, and treatment provided.If other diagnostic tests or procedures are performed, those results should also be documented.

** Excludes1: tachycardia NOS (R00.0), sinoatrial node re-entry tachycardia (I47.0). Code first any underlying conditions, such as drug-induced tachycardia.