1st Degree of AV Block | Medical Talks

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

First Degree AV Block - EKG (ECG) Interpretation

🫀Complete heart block, aka third-degree atrioventricular (AV) block occurs when there is a complete interruption or blockage in the electrical signals between the upper chambers (atria) and lower chambers (ventricles). Because signals are getting blocked, there is no association between the P waves and the QRS complexes causing them both beat independently of each other. The atria maintain their own rhythm, and the ventricles establish a separate rhythm.⁣ ⁣ 𝗦𝘆𝗺𝗽𝘁𝗼𝗺𝘀⁣ Patients with compl