That cardiac cycle in 0.8 seconds and double circulation, it means a heart pumps blood to lungs and body in one full beat, yaar. You calculate output by multiplying stroke volume and heart rate, they taught us in health camp pamphlets. But knowing the numbers didn't help me when I ignored my own chest tightness after long Ola shifts, thinking it was just tiredness. Now, seeing the doctor's bill, I realise a healthy heart isn't about calculations, but listening to it before it sends you a big invoice.
#exams#study
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