Bloomberg:

Lee was operated on early yesterday at Samsung Medical Center after being resuscitated and stabilized the previous night at Soonchunhyang University Hospital following an acute myocardial infarction, according to an e-mailed statement from Samsung Group spokeswoman Rhee So Eui.

As to the question of succession planning:

Naming his son as vice chairman “was a clear step” in terms of succession, Heo Pil Seok, Chief Executive Officer at Midas International Asset Management Ltd. in Seoul, said by phone yesterday.