What percentage of SVT are AVNRT?

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Prepare for the Electrophysiology Unit (EPU) 26.19 exam with our interactive quiz featuring flashcards and multiple choice questions. Check your understanding with hints and explanations for each question.

Multiple Choice

What percentage of SVT are AVNRT?

Explanation:
AVNRT is the most common form of supraventricular tachycardia, because dual pathways within or near the AV node readily create a reentrant circuit. This makes AVNRT the leading mechanism behind SVT, so it accounts for about six in ten SVT episodes. Therefore, sixty percent is the best estimate. The other percentages are less accurate because AVNRT’s share among SVT is not as high as eighty percent and not as low as twenty percent; the remaining cases come from less frequent SVT types such as AV reentrant tachycardia with an accessory pathway or focal atrial tachycardias.

AVNRT is the most common form of supraventricular tachycardia, because dual pathways within or near the AV node readily create a reentrant circuit. This makes AVNRT the leading mechanism behind SVT, so it accounts for about six in ten SVT episodes. Therefore, sixty percent is the best estimate. The other percentages are less accurate because AVNRT’s share among SVT is not as high as eighty percent and not as low as twenty percent; the remaining cases come from less frequent SVT types such as AV reentrant tachycardia with an accessory pathway or focal atrial tachycardias.

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