NURS 487 Midterm Practice Exam UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS
CO = SV x HR. Stroke volume depends on 3 factors preload, afterload and contractility.
Which factor is mainly dependent on the amount of venous blood returned to the heart?
a) Afterload
b) Preload
c) Contractility - CORRECT ANSWER B
A client is diagnosed with increased systemic vascular resistance. What will be the effect on
the heart?
a) Left atrium will be required to pump harder
b) Right atrium chamber will become enlarged
c) Left ventricle will be required to pump harder
d) Right ventricle will become ineffective - CORRECT ANSWER C
You are working on a med-surg unit and notice your patients pulse pressure has narrowed.
What is a cause of a narrowed pulse pressure?
a) Atherosclerosis
b) Low organ perfusion
c) Hypovolemia
d) Hyperkalemia - CORRECT ANSWER C
Which is an accurate statement regarding blood flow through the heart?
a) Flows from the left ventricle through the bicuspid valve
b) Flows from the right atrium through the aortic valve to the right ventricle
c) Flows from the right ventricle through the pulmonic semilunar valve
d) Flows from the left atrium through the tricuspid valve to the left ventricle - CORRECT
ANSWER C
Choose the correct statement:
a) The QRS complex represents atrial depolarization
, b) The T wave represents ventricular depolarization
c) Normal electrical conduction begins at the AV node
d) The SA node is the pacemaker of the heart
e) Conduction is dependent on the nervous system - CORRECT ANSWER D
What are the three most important ions responsible for the cardiac action potential? -
CORRECT ANSWER Calcium, Potassium, Sodium
i) Calcium ions moving into myocytes produces myocardial contraction
ii) Following depolarization, repolarization is due to potassium ions flowing out of the cell
iii) Sodium ion movement produces cell-to-cell conduction or depolarization of the heart
(exception is the AV node that depends on the slow movement of Calcium ions)
What landmarks are used on a patient's chest when setting up a 5 lead ECG? - CORRECT
ANSWER Right arm (white), Left arm (black), Right leg (green), Left leg (red), 4th
ICS right sternal border (V1 - brown)
One small box on an ECG represents:
a) 0.2 seconds and 5 mm
b) 0.04 seconds and 1mm
c) 0.1 seconds and 1mm
d) 6 seconds and 1mm - CORRECT ANSWER B
Child is admitted with chronic hypoxia. The nurse anticipates the child will exhibit:
a) normal growth and development
b) splitting of the second heart sound
c) periorbital edema
d) clubbing of the nail beds - CORRECT ANSWER D
In a child with a ventricular septal defect (VSD), blood flow is shunted from the:
a) left ventricle to the right ventricle
b) right ventricle to the left ventricle
c) aorta to the pulmonary artery
d) left atria to the right atria - CORRECT ANSWER A
Blood flows from the pulmonary veins into the: - CORRECT ANSWER left atrium
ACTUAL QUESTIONS AND CORRECT
ANSWERS
CO = SV x HR. Stroke volume depends on 3 factors preload, afterload and contractility.
Which factor is mainly dependent on the amount of venous blood returned to the heart?
a) Afterload
b) Preload
c) Contractility - CORRECT ANSWER B
A client is diagnosed with increased systemic vascular resistance. What will be the effect on
the heart?
a) Left atrium will be required to pump harder
b) Right atrium chamber will become enlarged
c) Left ventricle will be required to pump harder
d) Right ventricle will become ineffective - CORRECT ANSWER C
You are working on a med-surg unit and notice your patients pulse pressure has narrowed.
What is a cause of a narrowed pulse pressure?
a) Atherosclerosis
b) Low organ perfusion
c) Hypovolemia
d) Hyperkalemia - CORRECT ANSWER C
Which is an accurate statement regarding blood flow through the heart?
a) Flows from the left ventricle through the bicuspid valve
b) Flows from the right atrium through the aortic valve to the right ventricle
c) Flows from the right ventricle through the pulmonic semilunar valve
d) Flows from the left atrium through the tricuspid valve to the left ventricle - CORRECT
ANSWER C
Choose the correct statement:
a) The QRS complex represents atrial depolarization
, b) The T wave represents ventricular depolarization
c) Normal electrical conduction begins at the AV node
d) The SA node is the pacemaker of the heart
e) Conduction is dependent on the nervous system - CORRECT ANSWER D
What are the three most important ions responsible for the cardiac action potential? -
CORRECT ANSWER Calcium, Potassium, Sodium
i) Calcium ions moving into myocytes produces myocardial contraction
ii) Following depolarization, repolarization is due to potassium ions flowing out of the cell
iii) Sodium ion movement produces cell-to-cell conduction or depolarization of the heart
(exception is the AV node that depends on the slow movement of Calcium ions)
What landmarks are used on a patient's chest when setting up a 5 lead ECG? - CORRECT
ANSWER Right arm (white), Left arm (black), Right leg (green), Left leg (red), 4th
ICS right sternal border (V1 - brown)
One small box on an ECG represents:
a) 0.2 seconds and 5 mm
b) 0.04 seconds and 1mm
c) 0.1 seconds and 1mm
d) 6 seconds and 1mm - CORRECT ANSWER B
Child is admitted with chronic hypoxia. The nurse anticipates the child will exhibit:
a) normal growth and development
b) splitting of the second heart sound
c) periorbital edema
d) clubbing of the nail beds - CORRECT ANSWER D
In a child with a ventricular septal defect (VSD), blood flow is shunted from the:
a) left ventricle to the right ventricle
b) right ventricle to the left ventricle
c) aorta to the pulmonary artery
d) left atria to the right atria - CORRECT ANSWER A
Blood flows from the pulmonary veins into the: - CORRECT ANSWER left atrium
