Review Note
Last Update: 11/09/2024 02:20 PM
Current Deck: Geneeskunde::3e bachelor::long & hart::ZSO 30 Behandeling Angina Pectoris
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Question
Which of the following changes would most likely increase myocardial oxygen requirement?
Title
QType (0=kprim,1=mc,2=sc)
Q_1
A. Increased diastolic filling time
Q_2
B. Decreased sympathetic discharge
Q_3
C. Increased ejection time during systole
Q_4
D. Reduced preload and afterload
Q_5
E. Reduced double product
Answers
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Sources
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Extra 1
Which of the following changes would most likely increase myocardial oxygen requirement?
- A. Increased diastolic filling time
- Increased filling time (longer diastole) would actually allow more oxygen-rich blood to reach the heart muscle, potentially lowering oxygen requirements.
- B. Decreased sympathetic discharge
- Lower sympathetic activity usually reduces heart rate and contraction strength, thus decreasing oxygen demand.
- C. Increased ejection time during systole
- Correct Answer: Longer ejection time means the heart spends more time in systole, which requires more oxygen. Increased ejection time raises myocardial oxygen demand.
- D. Reduced preload and afterload
- Reducing preload and afterload decreases the amount of work the heart has to do, which typically reduces oxygen demand.
- E. Reduced double product
- Since the double product is an indicator of cardiac workload, reducing it would decrease the oxygen requirement of the heart.
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