Atrioventricular Nodal Reentrant Tachycardia (AVNRT): Mechanism & Management 🔹 Primary Mechanism & Ablation Target AVNRT is a macro-reentrant supraventricular tachycardia dependent on dual atrioventricular (AV) nodal physiology. The typical (slow-fast) circuit uses the slow pathway for antegrade conduction and the fast pathway for retrograde conduction. Catheter ablation targeting the slow pathway is the definitive therapy. The standard anatomical target is the right inferior nodal extension wi

❓ What is AVNRT? AVNRT (Atrioventricular Nodal Reentrant Tachycardia) is the most common type of supraventricular tachycardia (SVT). It happens when a reentrant circuit forms within the AV node, causing rapid, regular heartbeats. Common symptoms include palpitations, dizziness, and shortness of breath. 📉 Key ECG Features: · No visible P waves (simultaneous atrial & ventricular activation). · Pseudo R' wave in lead V1 (retrograde P wave distorting the terminal portion of the QRS). · Pseudo S wav

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

Reentrant Tachycardia vs. Junctional Tachycardia 🚀 Reentrant tachycardia refers to abnormal rapid heart rhythms caused by re-entry circuits within the heart. Let’s explore the differences between atrioventricular re-entry tachycardia (AVRT) and junctional tachycardia (JT): Atrioventricular Re-entry Tachycardia (AVRT): Mechanism: Occurs in patients with accessory pathways (often seen in Wolff-Parkinson-White syndrome). ⚡ECG Features: Orthodromic AVRT: Anterograde conduction via the AV node, resu