Negative QRS complex in lead I – Cardiology MCQ
Normally QRS complex is predominantly positive in lead I. A predominantly negative QRS complex in lead I can be seen in all of the following except:
1. Dextrocardia
2. Left bundle branch block
3. Arm lead inversion
4. Severe pulmonary hypertension
Correct Answer
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Johnson Francis
Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal