Tom McCartan spent a year looking at different ideas to see where he could have the greatest impact in healthcare and one area kept coming up. High blood pressure is the leading risk factor for all-cause mortality worldwide. It affects 1.3 billion people, causes 16 per cent of deaths, and 10 per cent of all health care costs, as it is the main cause of heart attacks, strokes and heart failure.  “But over 80 per cent of cardiovascular disease can be avoided through lifestyle changes,” McCartan, who has a background in medicine and biomedical engineering, said.  “When someone is diagnosed…

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