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SECTION V. CARDIOVASCULAR PHYSIOLOGY
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Which part of the ECG (eg, Figure 29–5) corresponds to ventricular repolarization?
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Which of the following normally has a slowly depolarizing “prepotential”?
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E. Ventricular muscle cells
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In second-degree heart block
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A. the ventricular rate is lower than the atrial rate.
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B. the ventricular ECG complexes are distorted.
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C. there is a high incidence of ventricular tachycardia.
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D. stroke volume is decreased.
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E. cardiac output is increased.
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Currents caused by opening of which of the following channels contribute to the repolarization phase of the action potential of ventricular muscle fibers?
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