What can reflect the process of left and right atrium depolarization is []
A. P wave
B. QRS complex
C. T wave
D. P-R interval
E. ST segment
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The fastest conducting site in the heart is []
A. Sinus node
B. Atrial muscle
C. Atrioventricular junction
D. Purkinje fiber
E. Ventricular muscle
The percentage of stroke output in which of the following volumes, called ejection fraction? []
A. returned blood volume
B. cardiac output per minute
C. Isovolumic diastolic volume
D. End-systolic volume
End-diastolic volume
The factors not related to the stroke volume is []
A. End-diastolic filling volume
B. Arterial blood pressure
C. Myocardial contractility
D. Heart rate
E. Types of transmembrane ion currents in ventricular myocytes
The autoregulation of heart pump function is directly related to []
A. End-systolic volume of ventricle
B. End-diastolic volume of ventricle
C. Mean arterial pressure
D. Heart reserve
E. Cardiac output
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