Normal ECG, illustration
Illustration of normal electrocardiograms (ECG) from a 23 year old woman before and during pregnancy. For many healthy people, the change of electrocardiogram with counter clockwise transposition is a normal electrocardiogram phenomenon, which only represents 'electrical' translocation, not anatomical translocation., Creditline:CHONGQING TUMI TECHNOLOGY LTD/SCIENCE PHOTO LIBRARY
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