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How to examine for radiofemoral delay.an OSCE guide

Radiofemoral delay is an important clinical sign that help to detect the coarctation of aorta
How to elicit radiofemoral delay?
To detect the radiofemoral delay you have to palpate the radial and femoral artery simultaneously.Normally the time taken for the pulse wave to reach the radial artery after the cardiac systole is 80 milliseconds and for the femoral artery it is 75milleseconds.If the femoral pulse is delayed compared to radial pulse it is called as radiofemoral delay.
Causes of radiofemoral delay
Coarctation ol aorta
Atherosclerosis of aorta.
Thrombosis or embolism of aorta