As a young cardiologist, Jeffrey Wessler knew most of his time would be spent treating patients with full-blown heart disease. It was a depressing realization.So he began researching ways to help at-risk people avoid getting sick through lifestyle changes and other interventions, and came up with a new specialty he calls preventative cardiology.”I wanted to figure out whether we could go from a reactive to proactive state,” said Wessler, a cardiology fellow at Columbia University Medical Center and the founder of a digital health company called Heartbeat. “To me, that’s really the next wave of where health care is going.”

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