If he results of the tests were negative, I would think something like every three years is good enough for an echo or a nuclear stress test is good enough.
More often with symptoms.
Usually an EKG with every physical is done...probably overtesting. (My PCP has a new machine so he hauls it out at every opportunity, almost every vistit, then shakes his head knowingly at the pretty squiggly lines."
)
Often what your insurance company will bear will limit the frequency. I am pretty sure that a symptomless person billing a nuclear test every year will wind up with denials from his insurance company...probably with good reason.
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