Answer:
The percentage for normal young adults usually lie between 300 and 400
Explanation:
Cardiac reserve could simply mean the difference between the rate at which the
heart pumps blood and its maximum capacity for pumping blood at
any given time.
Over the history of the test,Cardiac reserve has been measured in different ways with it been expressed in terms of percentage.
In healthy young adult,
the cardiac reserve is 300 to 400 per cent.
In athletically trained
persons, it is occasionally 500 to 600 per cent. But in heart failure,
there is no cardiac reserve.
Any Issue that prevents the heart from pumping blood satisfactorily
will reduce the cardiac reserve. This can result from ischemic heart
disease, primary myocardial disease, vitamin deficiency that affects
cardiac muscle, physical damage to the myocardium, valvular heart
disease, and many other factors.