In 1816, French physician René Laennec invented an instrument that allowed doctors to listen to the heart and lungs. That device — a stethoscope — eventually evolved from a simple wooden tube to a lightweight two-earpiece version most doctors today wear around their necks. Eko Health, a startup founded in 2013, is bringing this ubiquitous medical tool into the digital age by enhancing it with AI. Over the past decade, Eko has sold its stethoscope to more than 500,000 physicians and healthcare pr...