Unlikely. Cardiac: Re-Entry (↑ed automaticity far less) is the most common known basis for premature complexes. Overwhelmingly dominant basis for re-entry is muscle cell injury, especially endocardial cells, due to ischemia. All tests you mention, also angiograms, do not show ischemia or damage until quite advanced. Atherosclerosis begins in childhood & primary drivers: lipoproteins glucose BP smoking low fat foods.
Answered 12/14/2018
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