At Rapid Heart Rates

question 13

Multiple Choice

At rapid heart rates,

• A) the lengths of systole and diastole shorten equally.
• B) the length of systole stays almost constant, but the length of diastole shortens considerably.
• C) the length of systole increases at the expense of diastolic time shortening.
• D) diastolic time lengthens, and systolic time shortens.
• E) none of these answers.

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