RBBB. Incomplete
Patient. 25 year old female was noted to have occaional ventricular ectopy while donating her blood. She is otherwise healthy and has no cardiovascular problem.

Criteria
  1. QRS duration is <120 msec
  2. Amplitude of initial r < 0.8 mV
  3. Amplitude of r' < 0.6 mV
  4. r/S or r'/S ratio < 1.0

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