Whippet thin from his daily 2 1/2 mile walks, Ronnie Ho, 57, doesn't look as if he's suffering from high blood pressure. Nor is he. At its peak two years ago, Ho's blood pressure clocked in at 140/90, slightly above normal but not high enough to elicit a pill or much alarm. But when he went to see Dr. Ting Choon Meng, the Singapore general practitioner decided to monitor Ho's blood pressure with a black plastic wristwatch he had designed and named the BPro. The device, worn for 24 hours, revealed a wave pattern showing how fast and hard his heart was...
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