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Which of the following is NOT a determinant of myocardial oxygen supply? | Which of the following is NOT a determinant of myocardial oxygen supply? | ||
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D. Afterload | D. Afterload | ||
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==Answer== | ==Answer== | ||
The answer is D. Afterload, in itself is a deteminant of myocardial oxygen demand. Diastolic blood pressure, not afterload (they are not the same) is a determinant of myocardial oxygen supply. The other determinants of myocardial oxygen supply are cardiac output (HR x SV), oxygen content, coronary perfusion pressure (DBP-LVEDP), heart rate, and wall tension. This question is courtesy of Yaster and in preparation of the oral boards in the spring. | The answer is D. Afterload, in itself is a deteminant of myocardial oxygen demand. Diastolic blood pressure, not afterload (they are not the same) is a determinant of myocardial oxygen supply. The other determinants of myocardial oxygen supply are cardiac output (HR x SV), oxygen content, coronary perfusion pressure (DBP-LVEDP), heart rate, and wall tension. This question is courtesy of Yaster and in preparation of the oral boards in the spring. | ||
==Notes== | ==Notes== | ||
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==Keywords== | ==Keywords== | ||
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Latest revision as of 22:50, 23 January 2022
Which of the following is NOT a determinant of myocardial oxygen supply?
A. Heart rate
B. Hemoglobin
C. LVEDP
D. Afterload
Click for Answer
Answer
The answer is D. Afterload, in itself is a deteminant of myocardial oxygen demand. Diastolic blood pressure, not afterload (they are not the same) is a determinant of myocardial oxygen supply. The other determinants of myocardial oxygen supply are cardiac output (HR x SV), oxygen content, coronary perfusion pressure (DBP-LVEDP), heart rate, and wall tension. This question is courtesy of Yaster and in preparation of the oral boards in the spring.
Notes