Understanding Heart Block: First-Degree Heart Block: The electrical impulse reaches the ventricles but moves more slowly through the AV node. It’s the mildest type. Second-Degree Heart Block: Type I (Wenckebach’s AV Block): The signal gets slower until your heart skips a beat. Type II: Some signals don’t reach the ventricles, causing an irregular and slower heartbeat. This is more serious and may require a pacemaker. Third-Degree Heart Block: Complete blockage of the signal from atria to ventric
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Understanding Heart Block: First-Degree Heart Block: The electrica…
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First-Degree AV Block:🔍 A fixed delay in conduction at the AV node. Not a blockage, but a slowdown. 🔹 Diagnostic ECG Criteria ▸PR Interval: >200 ms (≥ 1 large box). ▸Rhythm: Regular sinus. ▸Conduction: 1:1 (Every P → QRS). ▸Constancy: Fixed PR interval. 💡 Clinical Pearls ▸Often Benign: Asymptomatic; common with high vagal tone, athletes, or medications (BB, NDHP-CCB, digoxin). ▸Context Matters: Assess for underlying heart disease, ischemia, or electrolytes. New onset in acute settings require
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First-Degree AV Block:🔍 A fixed delay in conduction at the AV node. Not …
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