File:Orthodromic atrioventricular reentrant tachycardia (AVRT) in the setting of an accessory AV pathway.jpg
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Orthodromic atrioventricular reentrant tachycardia (AVRT) in the setting of an accessory AV pathway
Summary[edit]
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| Description |
English: The rhythm strip shows a sinus (S) beat that has a short PR interval and a wide QRS complex as a result of a delta wave (d). Panel A shows an atrial premature beat (APB,*) that is blocked in the accessory pathway (AP), which has a long refractory period but is conducted antegradely through the atrioventricular node (N) and the His-Purkinje system, resulting in a normal PR interval and a narrow and normal QRS complex, as seen on the rhythm strip. After normal myocardial activation, the impulse is conducted retrogradely along the AP, activating the atrium in a retrograde fashion (panel B), which results in a negative P wave. If this activation sequence repeats itself (panel C), an orthodromic atrioventricular reentrant (or reciprocating) tachycardia (AVRT) is established.
Русский: Полоса ритма показывает синусовый ритм (S), который имеет короткий интервал PR и широкий комплекс QRS в результате дельта-волны (d). На панели А показан предсердный преждевременный удар (APB,*), который блокируется в вспомогательном пути (AP), который имеет длинный рефрактерный период, но проводится антеградно через атриовентрикулярный узел (N) и систему His-Purkinje, что приводит к нормальному интервалу PR и узкому и нормальному комплексу QRS, как видно на полосе ритма. После нормальной активации миокарда импульс проводится ретроградно вдоль ПД, ретроградно активируя предсердие (панель B), что приводит к отрицательной P-волне. Если эта последовательность активации повторяется (панель С), возникает ортодромная атриовентрикулярная реентрантная (или реципрокная) тахикардия (АВРТ). |
| Date | |
| Source | https://www.uptodate.com/contents/atrioventricular-reentrant-tachycardia-avrt-associated-with-an-accessory-pathway?search=AVRNT&source=search_result&selectedTitle=1~84&usage_type=default&display_rank=1#H1 |
| Author | UPTODATE |
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