Viz.ai raises $50 million for AI that detects early signs of stroke

Viz.ai, a healthcare startup that's using artificial intelligence (AI) to help medical professionals spot early signs of stroke, has raised $50 million in a series B round of funding led by Greenoaks, with participation from Alphabet's VC arm GV and Kleiner Perkins. In the U.S. alone, someone has a stroke every 40 seconds, according to data from the Centers for Disease Control and Prevention (CDC), culminating in some 140,000 deaths each year -- or 1 in every 20 deaths. Moreover, those who survive a stroke often suffer long-term disability as a result. As with many medical conditions, early stroke detection is the key to treating and negating the impact of strokes, but they can be difficult to diagnose. And even then, coordinating treatment among the various specialists can cause unnecessary delays.