2025 QUESTIONS AND ANSWERS
The Right Atrium
A) pumps blood to the lungs
B) pumps blood to the systemic circulation
C) receives blood from the right and left pulmonary veins
D) receives blood from the inferior vena cava, superior vena cava, and coronary sinus -
ANS D) Receives blood room from the inferior vena cava, superior vena cava, and coronary
sinus
Although about 70% of ventricular filling occurs passively, _______________ _______________
contributes an additional 10-30% of blood flow to ventricular filling. - ANS Atrial kick
Which of the following conditions are potentially reversible?
A) myocardial ischemia and myocardial injury
B) myocardial injury and MI
C) myocardial ischemia and MI - ANS A) Myocardial ischemia and myocardial injury
The pericardium is - ANS A double walled sac that encloses the heart and is filled with
lubricating fluid
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, If a patient's heart rate is faster than normal for his age, why might this finding be a cause for
concern? - ANS Rapid heart rates shorten diastole and can result in decreased CO
True OR False
If the wave of depolarizations (electrical impulse) moves toward the positive electrode, the
waveform recorded on the ECG graph paper will be inverted (negative deflection) - ANS False
It is positive deflection and will be upward
True OR False
Ventricular depolarization is reflected on the ECG as the T wave - ANS False
It is ventricular repolarization
True OR False
Abnormal automaticity is a disorder of impulse conduction - ANS FALSE
The ST segment is measured from - ANS The end of the QRS complex tot he beginning of the
T wave
Five large boxes, each consisting of five small boxes, represents _________ on ECG paper. -
ANS 1 second
Which part of the conduction system receives an impulse from the SA node but delays relaying
that impulse to the bundle of HIS, allowing time for the atria to empty their contents into the
ventricles before the onset of ventricular contraction? - ANS AV NODE
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