Q:

The ECG of a 65 year old shows absent P waves, narrow QRS complex, ventricular rate of 120bpm and irregular R-R interval. What is the most probable diagnosis?

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The ECG of a 65 year old shows absent P waves, narrow QRS complex, ventricular rate of 120bpm and irregular R-R interval. What is the most probable diagnosis?


  1. A-fib
  2. A-flutter
  3. SVT
  4. Mobitz type 1 2nd degree heart block
  5. Sinus tachycardia

All Answers

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The key ia A. Atrial fibrillation. [In Atrial fibrillation fibrillatory f waves replaces p waves and R – R intervals are irregular].

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