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Again, like I've already explained, a stent does not reverse cardiomyopathy, which is what typically lowers the ejection fraction. The heart muscle, if suffering from atrophy due to low perfusion, does not grow back even when you re-vascularize.
So, you're not seeing it. No wonder. You can't *see* the heart function just by looking at someone or listening to his debate answers. You'd need an EKG and an echo to "see" it. You can also prevent arrhythmias that might lead to confusion and fainting, with medication; you can also mask the more visible consequences of congestive heart failure by giving diuretics before an event. If Bernie's personal physician gives him an IV shot of Lasix before a debate, you're not likely to "see" shortness of breath. But you can't keep compensating it forever. A very low ejection fraction points to very bad prognosis and very curtailed life expectancy. You can keep the person functioning but at one point it all goes down the drains, unless you perform a heart transplant. By the way, at his age, a heart transplant can also cause huge cognitive issues; some patients of his age can get half-demented after extensive extra-corporeal circulation, and the prognosis at his age for a major surgery like this is somber.
You are mixing up the vessels part, with the muscle part. A stent can correct a heart perfusion blockade and if it's all that it is, fine, people can do well. But myocardiopathy with low ejection fraction can't be corrected with a stent, as it is a muscular issue, not a vascular issue. Sure, it is often caused by the vascular issue, but it acquires a life of its own, so to speak.
Yeah, I agree about Tulsi, my including her was a bit of tongue-in-cheek.
I'm getting it perfectly well.
Neither Biden nor Sanders have released important medical information they should.
Meanwhile, again, as I've repeatedly said, the fundamental thing is that there is thus far zero (0) demonstrable evidence of Sanders actually having serious heart issues whether that be ejection fraction problems, or heart muscle issues. I'm not pointing to Sanders' public appearances and ostensible health as a smoking gun or proof positive that he doesn't have heart issues; I'm saying that what I can see thus far doesn't really lend itself to the idea he has them.
There are, conversely, comparatively abundant and glaring symptoms of Biden's mental decline.