Did you notice he died at age 61 -- in modern times, this is a "young" age to die.  >>> "享年六十一歲"<<<   

Unless he has hereditary 心臟病, otherwise, he might not have followed a healthy diet and/or exercise regularly.   

I am not saying doctors are exempt from death.  But he died really really young considering he was in the medical profession - unless of course he had hereditary heart disease.  He ought to know better. 

My grandfather's older brother was a 中醫, he died at age 92 due to general organ failure (not from any specific disease). 

So don't tell me it's natural and perfectly OK to die like that at age 61.  If you need a second opinion, ask "Mensch".