What is “”Double Product” on a 24 hrs. heart-monitor test results sheet?
There is a difference between “Work” and Workload” and it is incorrect to conflate the two. -It is easy to demonstrate this by example. A workman is allotted his day’s workload, to shovel a pile of coal from A to B. That is fixed, and it is his workLOAD. But his WORK is how much of the allotted pile he does actually shovel from A to B during the day. -It may well be only half of the pile, and it is therefore quite incorrect to call his work his “workload”. To clear up the question, because both pulse rate and systolic pressure readings tend to rise when the heart is called upon to do more work, then multiplying the two does give a rough indication of rising and falling cardiac work levels in a 24 hrs.
