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(326) Cardiovascular Myths and Misconceptions

1. Contractility is most correctly described by what changes?
A. An increase in force development
B. An increase in force and velocity development
C. An increase in cardiac output
D. An increase in arterial blood pressure
2. How is cardiac performance assessed?
A. Changes in cardiac output
B. Changes in heart rate
C. Changes in arterial blood pressure
D. Changes in cardiac contractility
3. What is the best determinant of the propensity to develop cardiac arrhythmias in animals with a long QT interval?
A. Peaked T waves
B. Prolonged Tp-e intervals
A. Sinus bradycardia
B. QRS alternans
4. If the heart is not a pump where does the power to generate blood flow originate?
A. Vortices
B. Veins
C. Capillaries
D. Arteries
5. Which factor is the least important for determining cardiac output?
A. Heart rate
B. Stroke volume
C. Contractility
D. Central venous pressure
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