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Question: What is measured by an ECG – what are the actual units on the
ECG plot [the X and y axes]? How ca…


What is measured by an ECG – what are the actual units on the
ECG plot [the X and y axes]? How can we measure how long it takes
for one heartbeat (aka, beat period) by looking at the ECG trace?
What physical action(s) cause the two heart sounds? Which valves
are involved for the “lub” sound? “dub”sound? What causes a heart
murmer?

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