IF/JUDDD and heart damage?

firstsip

So, I guess I'm just looking for hopefully references or links in this thread (since I've had a hard time finding clear cut stuff on Google myself, which is unusual...), but:

Are there any studies/is there any information on heart damage or heart issues with IF/JUDDD? I know the general rule of thumb is that these lifestyles generally improve almost all aspects of bodily health, but I do know that long periods of calorie restriction (more specifically with EDs) can really affect the heart. I KNOW that IF/JUDDD are not the same type of calorie restriction at all, but I'd rest easier having research or article or even opinions to look at.

I'm just concerned, since I have tachycardia/irregular heart beat (all due to thyroid, not weight related or anything. My heart's also fine, since I've had an echo, monitor, etc.)... and I don't want to end up like Brittany Murphy (who was anorexic most of her life and developed a weak heart that did her in).

Again, I repeat: I know that JUDDD/IF are not ED type disorders. I just worry about the heart