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This is a part answer (as this is outside of my field), but the article Self Regulation of the Heart: Natural Frequency and Damping of the Heart Contractions (Bahramali et al. 2009) imply that 'normal' frequencies may not be possible to precisely define, due to: ECG frequency analysis is complicated by the fact that ECG signals are non-stationary, that ...


2

I suspect I won't be crunching as much numbers as you'd want me to, however here are some basic points: Statins have shown a clear ability to improve the blood llipid profile. Their use in primary/secondary prevention for cardiac events is justified by the belief that less blood lipid will leave less lipids to clog the arteries with. This is an old ...


3

The heart has nerve cells which are supposed to fire synchronously. This is what allows the heart to pump effectively. Fibrillation is when nerve cells (or the cardiac cells themselves, which have some "pacemaker" activity) are firing asynchronously, which means blood isn't getting pumped. The shock causes all of the units to fire at once (which isn't ...


7

In layman's terms: an Asystole is not affected by the electric shocks of a defibrillator. A defibrillator is used when the heart goes in fibrillations because it actually CAUSES an asystole. The idea is that you basically reset the heart to a blank state so you can start normal CPR procedure to help the heart go back to a normal rythm. That's why you see ...


0

Raoul's gives sensible comments: ventricle overloading not sensible retrosternal pain $\to$ myocardial ischemia other cause reminding retrosternal pain such as celiac disease: Another possibility is misdiagnosed symptom of the patient. If I remember correctly, the right answer here was that the patient had undiagnosed celiac disease which caused pains ...



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