Did Putin Have 'Cardiac Arrest'? What We Know, What We Don't

Several news outlets reported a rumor this week that Russian President Vladimir Putin had suffered a cardiac arrest, collapsing in the presidential bedroom.

The reports added that the 71-year-old Russian leader had to be resuscitated and taken to a special intensive care unit after security heard him falling to the floor.

Putin's health has been a subject of rumor for years, with Kremlin secrecy letting speculation run unbound. Interviews and recorded meetings with other world leaders have often been scrutinized for clues hinting at whether he may be sick or...