AVRT orthodromic

Atrioventricular Reentrant Tachycardia is an arrhythmia that is regular and fast (150-250 bpm). There are two variations: orthodromic and antidromic. The orthodromic rhythm features a re-entry circuit where the impulse travels from AV node to ventricles then back through an accessory bundle to the atria again. This results in a P wave followed by a narrow QRS complex. The antidromic variant is the opposite direction.

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