Aye, indeed BS. One crude statistic about many mammals is their seeming inability to survive more than one and a half billion heartbeats. TM slows the heart down. mebbe summat in that. Then again, he was rumoured to be a chilled out old letch well into late middle age. No proof ever offered, but strong rumours.
That can't be right, living to 70 at 72bpm gives you 2.6bn.