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MCQ 5: El-Sherif sign

Q. El-Sherif sign is?
A. rSR complex in lateral chest leads
B. Persistent ST elevation in anterior leads in myocardial infarction
C. PR prolongation in acute rheumatic fever
D. Delta wave in WPW syndrome


Answer: A

Explanation:
A characteristic rsR′ pattern or its variants (rSr′ or rSR′) with normal or prolonged QRS duration in left surface leads including the apex lead and the orthogonal scalar X lead may be seen in patients with coronary heart disease and left ventricular aneurysm. This was first described by El-Sherif in 1970 hence known as El-Sherif sign.

 Reference:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC487350/
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