Third-degree AV block (complete heart block) shows no relationship between P waves and QRS complexes. Atria and ventricles beat independently. The ventricular escape rhythm is typically slow (20-40 BPM). This is a medical emergency requiring immediate pacing. #ECG #Cardiology #MedEd #HeartBlock | Abdallah Othman

Ventricular Escape Rhythm (Idioventricular Rhythm) A ventricular escape rhythm is a life-preserving, default cardiac rhythm that emerges when there is failure of higher pacemakers. It occurs when the rate of supraventricular impulses arriving at the ventricles falls below the intrinsic firing rate of the ventricular pacemaker cells. Pacemaker Hierarchy & Intrinsic Rates: · SA Node: 60–100 bpm · AV Node (Junctional): 40–60 bpm · Ventricles: 20–40 bpm Mechanism: When impulses from the SA and AV no

Ventricular Escape Rhythm occurs when the ventricles take over pacing due to failure of the SA and AV nodes. SA Node: 60–100 bpm AV Node: 40–60 bpm Ventricles: 20–40 bpm 🚨 Causes Severe sinus disease Advanced AV block Myocardial infarction Drug toxicity (e.g., beta-blockers, digoxin) Hyperkalemia Cardiac surgery complications. #Cardiology #ECG #Arrhythmia #MedEd #idioventricularrhythm | Abdallah Othman

Ventricular Escape Rhythm occurs when the ventricles take over pacing due to failure of the SA and AV nodes. SA Node: 60–100 bpm AV Node: 40–60 bpm Ventricles: 20–40 bpm 🚨 Causes Severe sinus disease Advanced AV block Myocardial infarction Drug toxicity (e.g., beta-blockers, digoxin) Hyperkalemia Cardiac surgery complications. #Cardiology #ECG #Arrhythmia #MedEd #idioventricularrhythm | Abdallah Othman