It's not just your heart.
Geriatrician Muriel R. Gillick, in her book "The Denial of Aging, emphasizes the social consequences of faith in an ageless old age: “If we assume that Alzheimer’s disease will be cured and disability abolished in the near term,” she writes, “we will have no incentive to develop long-term-care facilities that focus on enabling residents to lead satisfying lives despite their disabilities.”
Aside from which, currently there is nowhere in the world where society is adequately planning for an economic transition to a generally sustainable model for life that will protect the biosphere, the ecosphere or develop a politisphere capable of allowing 'humanity' to achieve the dubious goal of for average lifespan. The competitive model of economics and politics won't allow for it, and the wealthy who promote the concept that enough gated sanctuaries might survive the turmoil that will occur if mankind continues pushing the envelope to determine the actual carrying capacity of the earth are already delusional or just nihilistic enough to believe that The Tau and the DOW are synonymous.
Whatever New Age drivel was cited in TFA should be ignored because the evidence is clear, a globalized, competitive economically will collapse long before the average lifespan grows by another 10%. And even though your grandparents aren't talking about, assuming they're able, the quality of life beyond 80 exists on a graph defined by a decreasing curvilinear function. If you want to consider your mortality you should really think of it in terms of your legacy, not your longevity.
Of course if you live in a consumer society, that's a bit like encouraging a fish to think about space travel.