Electrocardiograms

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Offline portugal

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Electrocardiograms
« on: 19/08/2007 08:23:41 »
I have 2 questions to ask:

1. Why does the QRS complex have a larger amplitude then P wave?
My answer to this is that since voltage is proportional to the amount of muscle being depolarised and the ventricles are thicker than the atria and thus have a greater amount of mass then QRS>P wave???? i am not sure

2. Why can a very fit person have a slower heart rate than average fitness person?

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paul.fr

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Electrocardiograms
« Reply #1 on: 19/08/2007 08:32:26 »

2. Why can a very fit person have a slower heart rate than average fitness person?

question 2 i do remember, very fit people such as athletes do / can have a slower heart rate  or pulse rate because their hearts are strong enough to pump large amounts of blood with each beat so they don't have to beat as often as that of an unfit person