Which of These Events Occurs at Rapid Heart Rates

question 144

Multiple Choice

Which of these events occurs 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.

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