Second-Degree Atrioventricular (AV) Block

Team SH

Published on

July 1, 2025

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Hindi

Second-Degree Atrioventricular (AV) Block is a type of heart block where some of the electrical signals from the upper chambers (atria) fail to reach the lower chambers (ventricles), causing missed heartbeats and irregular rhythms. 🫀 Types of Second-Degree AV Block: 🔹 Mobitz Type 1 (Wenckebach): - The signal delay gradually increases until one beat is completely blocked - Usually benign and temporary - Common in athletes or during sleep 🔹 Mobitz Type 2: - Sudden, unpredictable dropping of beats without prior delay - More serious and can progress to complete heart block - Often needs a pacemaker 🔍 Causes Can Include: - Coronary artery disease or heart attack - Myocarditis or cardiomyopathy - Electrolyte imbalances - Certain medications (beta-blockers, digoxin) - Aging of the conduction system 📉 Symptoms (may vary): - Dizziness or light-headedness - Fainting (syncope) - Fatigue - Palpitations - Shortness of breath