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Tiny sensor keeps heart patient out of hospital
USA Today

Three years ago, Walter Pieschel of Richwood, Ky., couldn’t climb a flight of stairs without stopping to catch his breath. Now he can climb three. As a participant in a clinical trial, Pieschel, 73, who has chronic congestive heart failure, had an experimental sensor implanted in his pulmonary artery in 2008. His heart can’t adequately pump blood through his body, so there is a danger that fluid will build up in his lungs, cutting off his ability to breathe. That caused him to be hospitalized 15 times in two years.

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