I read this in my e-mail just want to ask if it true.

A simple tweak when checking blood pressure can detect a blocked artery. According to a Columbia university study after taking a systolic blood pressure reading from their patients right and left arm.
Doctor discovered that a difference of 20 to 40 mm of mercury between two arms indicated the patient had blocked arteries.


If you check your own blood pressure on both arm and find a consistent difference of more than 11 mm of mercury se your doctor---- a blockage may about be forming.