Atrioventricular Reentrant Tachycardia (AVRT) ✨(AVRT) is a type of supraventricular tachycardia (SVT) caused by a reentrant circuit involving the AV node and an accessory pathway (AP). Pathophysiology - Reentry circuit: AV node accessory pathway (AP). - Orthodromic (90%): Narrow QRS ➡️ AP retrograde. - Antidromic (10%): Wide QRS ⚠️ (mimics VT). 📈 ECG Signs: - Orthodromic: Retrograde P wave after QRS, ❌ delta wave during tachycardia. - Antidromic: Wide QRS, delta wave in sinus rhythm (WPW). - WP
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Atrioventricular Reentrant Tachycardia (AVRT) ✨(AVRT) is a …
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🔁 AVRT Quick Visual Guide. 1️⃣ Orthodromic AVRT (Most Common): → Pathway: Antegrade AV node ➡️ Retrograde accessory pathway. → ECG: Narrow QRS, retrograde P waves (RP > PR). → Key: Classic in WPW syndrome. 2️⃣ Antidromic AVRT (Rare): → Pathway: Antegrade accessory pathway ➡️ Retrograde AV node. → ECG: Wide QRS (mimics VT), retrograde P waves (often buried). → Key: Riskier due to preexcitation. #Cardiology #Electrophysiology #AVRT #WPW #ECG | Abdallah Othman
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AVNRT vs. AVRT: AVNRT: Microreentry within the AV node. · ECG: Short RP interval. P wave typically buried (pseudo R' V1). · Baseline: No pre-excitation. AVRT: Macroeentry utilizing an accessory pathway. · ECG: Long RP interval. Discrete retrograde P wave in ST segment. · Baseline: Often exhibits pre-excitation (WPW pattern). Critical: Pre-excited AF requires avoidance of nodal blockade. Like ✅ | Share 🔁 | Comment 💬 #Cardiology #Electrophysiology #SVT #ECG #HeartRhythm | Abdallah Othman
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