Podcast
Questions and Answers
Which of the following factors has the most direct and proportionate effect on myocardial oxygen consumption (MVO2)?
Which of the following factors has the most direct and proportionate effect on myocardial oxygen consumption (MVO2)?
- Afterload
- Preload
- Inotropy (correct)
- Heart rate
If heart rate increases by 50%, what is the expected change in myocardial oxygen consumption (MVO2)?
If heart rate increases by 50%, what is the expected change in myocardial oxygen consumption (MVO2)?
- MVO2 increases by 25%
- MVO2 increases by 75%
- MVO2 increases by 100%
- MVO2 increases by 50% (correct)
Which of the following is NOT a factor that affects myocardial oxygen consumption (MVO2)?
Which of the following is NOT a factor that affects myocardial oxygen consumption (MVO2)?
- Ventricular diastolic pressure
- Contractility
- Coronary blood flow (correct)
- Ventricular wall tension
If afterload increases, what is the expected change in myocardial oxygen consumption (MVO2)?
If afterload increases, what is the expected change in myocardial oxygen consumption (MVO2)?
If preload increases, what is the expected change in myocardial oxygen consumption (MVO2)?
If preload increases, what is the expected change in myocardial oxygen consumption (MVO2)?
What is the relationship between inotropy and ejection fraction (EF) according to the text?
What is the relationship between inotropy and ejection fraction (EF) according to the text?
Which type of heart failure is characterized by a reduced ejection fraction?
Which type of heart failure is characterized by a reduced ejection fraction?
What is the role of the sympathetic nervous system in regulating inotropy?
What is the role of the sympathetic nervous system in regulating inotropy?
How does calcium regulation affect inotropy?
How does calcium regulation affect inotropy?
Which of the following graphs would best represent the relationship between cardiac output and ejection fraction?
Which of the following graphs would best represent the relationship between cardiac output and ejection fraction?
What is the primary mechanism by which the sympathetic nervous system increases cardiac output?
What is the primary mechanism by which the sympathetic nervous system increases cardiac output?
Which of the following statements about the Frank-Starling mechanism is correct?
Which of the following statements about the Frank-Starling mechanism is correct?
Which of the following changes would cause a decrease in the slope of the cardiac output curve?
Which of the following changes would cause a decrease in the slope of the cardiac output curve?
What is the primary mechanism by which calcium ions $\text{(Ca}^{2+}\text{)}$ increase cardiac contractility?
What is the primary mechanism by which calcium ions $\text{(Ca}^{2+}\text{)}$ increase cardiac contractility?
Which of the following statements about the cardiac cycle is correct?
Which of the following statements about the cardiac cycle is correct?
