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
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Ventricular Escape Rhythm (Idioventricular Rhythm) A ventric…
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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
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Ventricular Escape Rhythm occurs when the ventricles take over paci…
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What's really happening in a PVC? 🤔 Premature Ventricular Contractions (PVCs) are early, abnormal electrical signals from the ventricles that disrupt the heart’s normal rhythm. While they’re actually extra beats, they often feel like a skipped beat—why? A PVC comes early before the heart has time to fill with blood, creating a weak pulse that’s barely felt. The next beat, after extra filling time, is stronger, leading to that noticeable ‘thump’ in the chest. Most PVCs are harmless, but frequent
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What's really happening in a PVC? 🤔 Premature Ventricular Contraction…
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Premature Ventricular Contractions (PVCs)
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