Cardiology Quiz #7: Myocardial Oxygen Demand

1. A 60-year-old male with a history of coronary artery disease presents to the clinic complaining of chest pain on exertion. The chest pain is relieved by rest. This pattern of chest pain is most likely due to an imbalance between myocardial oxygen supply and demand. Which of the following factors primarily increases myocardial oxygen demand during exertion? 

Question 1 of 5

2. Which of the following pharmacological agents primarily decreases myocardial oxygen demand by reducing heart rate? 

Question 2 of 5

3. A patient is diagnosed with a myocardial infarction and is noted to have increased myocardial oxygen demand. Which of the following contributes least to the increase in myocardial oxygen demand in this patient? 

Question 3 of 5

4. During a pharmacology lecture, a professor discusses the effects of nitrates on myocardial oxygen demand. Nitrates primarily reduce myocardial oxygen demand by which of the following mechanisms? 

Question 4 of 5

5. A study is conducted to evaluate the effects of different physiological parameters on myocardial oxygen demand. One of the findings is that an increase in a certain parameter is associated with a significantly increased demand for myocardial oxygen, particularly in patients with coronary artery disease. Which of the following parameters most directly increases myocardial oxygen demand by increasing myocardial fiber shortening? 

Question 5 of 5


 

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