Cardiac Patho Practice Test Questions with
Detailed Verified Answers
During which interval on the EKG does the aortic valve close? Ans: E
In a test subject, oxygen consumption was measured at 700 mL/min. Pulmonary artery
oxygen content was 140 mL per liter of blood and brachial artery oxygen content was
210 mL per liter of blood. Cardiac output was which of the following?
a. 4.2 L/min
b. 7.0 L/min
c. 10.0 L/min
d. 12.6 L/min
e. 30.0 L/min Ans: C
Which one of the following is the best index of preload?
a. Blood volume
b. Central venous pressure
c. Pulmonary capillary wedge pressure
d. Left ventricular end-diastolic volume
e. Left ventricular end-diastolic pressure Ans: D
Which one of the following is the best index of afterload?
,a. Left ventricular end-diastolic pressure
b. Left ventricular mean systolic pressure
c. Pulmonary capillary wedge pressure
d. Total peripheral resistance
e. Mean arterial blood pressure Ans: B
The highest blood flow per gram of left ventricular myocardium would occur
a. When aortic pressure is highest
b. When left ventricular pressure is highest
c. At the beginning of isovolumic contraction
d. When aortic blood flow is highest
e. At the beginning of diastole Ans: E
Which of the following is consistent with the ECG tracing shown below?
a. Bradycardia
b. First-degree heart block
c. Second-degree heart block
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,d. Third-degree heart block
e. Tachycardia Ans: B
The mean electrical axis during the ventricular depolarization recorded in the three
leads shown below would be closest to
a. 30 degrees
b. 90 degrees
c. 150 degrees
d. 210 degrees
e. 270 degrees Ans: A
During ventricular ejection, the pressure difference smallest in magnitude is between
the
a. Pulmonary artery and left atrium
b. Right ventricle and right atrium
c. Left ventricle and aorta
d. Left ventricle and left atrium
e. Aorta and capillaries Ans: C
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, Which of the following would result from a regurgitant aortic valve in a nonfailing
heart?
a. A decrease in diastolic pressure
b. A decrease in cardiac energy consumption
c. A systolic murmur
d. A decrease in heart rate
e. A decrease in systolic blood pressure Ans: A
Stroke volume is increased by
a. A decrease in venous compliance
b. An increase in afterload
c. A decrease in contractility
d. An increase in heart rate
e. A decrease in coronary blood flow Ans: A
An increased preload would most likely be caused by an increase in
a. Arteriolar tone
b. Venous tone
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Detailed Verified Answers
During which interval on the EKG does the aortic valve close? Ans: E
In a test subject, oxygen consumption was measured at 700 mL/min. Pulmonary artery
oxygen content was 140 mL per liter of blood and brachial artery oxygen content was
210 mL per liter of blood. Cardiac output was which of the following?
a. 4.2 L/min
b. 7.0 L/min
c. 10.0 L/min
d. 12.6 L/min
e. 30.0 L/min Ans: C
Which one of the following is the best index of preload?
a. Blood volume
b. Central venous pressure
c. Pulmonary capillary wedge pressure
d. Left ventricular end-diastolic volume
e. Left ventricular end-diastolic pressure Ans: D
Which one of the following is the best index of afterload?
,a. Left ventricular end-diastolic pressure
b. Left ventricular mean systolic pressure
c. Pulmonary capillary wedge pressure
d. Total peripheral resistance
e. Mean arterial blood pressure Ans: B
The highest blood flow per gram of left ventricular myocardium would occur
a. When aortic pressure is highest
b. When left ventricular pressure is highest
c. At the beginning of isovolumic contraction
d. When aortic blood flow is highest
e. At the beginning of diastole Ans: E
Which of the following is consistent with the ECG tracing shown below?
a. Bradycardia
b. First-degree heart block
c. Second-degree heart block
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,d. Third-degree heart block
e. Tachycardia Ans: B
The mean electrical axis during the ventricular depolarization recorded in the three
leads shown below would be closest to
a. 30 degrees
b. 90 degrees
c. 150 degrees
d. 210 degrees
e. 270 degrees Ans: A
During ventricular ejection, the pressure difference smallest in magnitude is between
the
a. Pulmonary artery and left atrium
b. Right ventricle and right atrium
c. Left ventricle and aorta
d. Left ventricle and left atrium
e. Aorta and capillaries Ans: C
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, Which of the following would result from a regurgitant aortic valve in a nonfailing
heart?
a. A decrease in diastolic pressure
b. A decrease in cardiac energy consumption
c. A systolic murmur
d. A decrease in heart rate
e. A decrease in systolic blood pressure Ans: A
Stroke volume is increased by
a. A decrease in venous compliance
b. An increase in afterload
c. A decrease in contractility
d. An increase in heart rate
e. A decrease in coronary blood flow Ans: A
An increased preload would most likely be caused by an increase in
a. Arteriolar tone
b. Venous tone
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