Free Practice Quiz Question List

4 Preload and Afterload Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Preload and Afterload, test your knowledge, and prepare for your next test or exam.

20 questions

Fill in the blank

1 point

Right-ventricular afterload is influenced primarily by .

Choose one

1 point

Which condition can increase left-ventricular afterload by making it harder for the ventricle to eject blood?

A
Reduced systemic vascular resistance
B
Dehydration
C
Aortic stenosis
D
Increased venous return

Written response

1 point

What mechanism explains why greater ventricular filling usually increases contraction force and stroke volume within the heart’s physiologic range?

Choose all

1 point

Select all factors that can reduce venous return or ventricular preload.

A
Hemorrhage
B
Dehydration
C
Venoconstriction
D
Venodilation
E
A very rapid heart rate that shortens diastole
F
Fluid retention

Fill in the blank

1 point

A stiff or poorly relaxing ventricle may have high filling pressure despite a relatively small .

Choose one

1 point

A patient is bleeding and their stroke volume is falling. Which change provides a plausible explanation?

A
Reduced venous return can lower preload and stroke volume.
B
Increased afterload is the expected direct result of blood loss.
C
Preload must increase because the heart is contracting faster.
D
Blood loss cannot affect stroke volume.

Written response

1 point

What reversible bedside maneuver can temporarily increase venous return while clinicians measure whether stroke volume or cardiac output rises?

Choose all

1 point

A patient with heart failure has elevated filling pressures and pulmonary congestion, with little improvement in output after additional fluid. Select all conclusions supported by these findings.

A
Additional fluid may produce little improvement in output.
B
Elevated filling pressure proves that additional fluid will improve output.
C
Additional fluid may worsen pulmonary congestion.
D
Pulmonary congestion rules out any possibility of fluid responsiveness.

Choose one

1 point

Which statement best explains how a very rapid heart rate can affect ventricular filling?

A
A rise in preload must reduce stroke volume.
B
Heart rate has no effect on ventricular filling.
C
A very rapid heart rate can shorten filling time and reduce preload.
D
A rise in filling pressure always means a larger end-diastolic volume.

Choose one

1 point

A patient has a stiff, poorly relaxing ventricle and an elevated filling pressure. Which interpretation is most accurate?

A
The patient must have a large end-diastolic volume because filling pressure is high.
B
The ventricle may have high filling pressure despite a relatively small end-diastolic volume.
C
The finding proves that the ventricle will respond to additional fluid.
D
The finding directly measures ventricular contractility.

Choose one

1 point

A patient loses blood after an injury. Which change is most likely to contribute to a fall in stroke volume?

A
Hemorrhage increases preload by raising ventricular filling pressure.
B
Hemorrhage primarily raises left-ventricular afterload.
C
Hemorrhage can reduce venous return and preload.
D
Hemorrhage increases preload by lengthening diastole.

Choose one

1 point

A patient with impaired ventricular contractility develops increased systemic vascular resistance. What is the most likely effect on stroke volume?

A
Stroke volume may fall because the ventricle must eject against greater resistance.
B
Stroke volume must rise because increased resistance increases preload.
C
Stroke volume will remain unchanged because afterload affects only the right ventricle.
D
Contractility will necessarily improve to overcome the resistance.

Choose one

1 point

Which listed factor primarily influences right-ventricular afterload?

A
Systemic vascular resistance
B
Aortic pressure
C
Aortic stenosis
D
Pulmonary vascular resistance

Choose one

1 point

A clinician uses a patient's blood pressure to assess hemodynamics. Which statement about using blood pressure to judge ventricular afterload is most accurate?

A
Blood pressure directly measures left-ventricular afterload.
B
Systemic vascular resistance fully determines afterload for both ventricles.
C
Blood pressure is a useful clue, but it does not directly measure ventricular afterload.
D
Ventricular geometry affects preload but not afterload.

True or false

1 point

True or false: An elevated central venous pressure (CVP), by itself, proves that a patient has excess circulating volume.

A
True
B
False

Written response

1 point

A patient has increased ventricular filling within the heart's physiologic range, followed by increased contraction force and stroke volume. What mechanism describes this response?

Written response

1 point

A patient's heart rate is $80\,\text{beats/min}$ , and stroke volume is $0.075\,\text{L/beat}$ . Using $CO=HR\times SV$ , calculate the cardiac output in L/min.

True or false

1 point

A patient receiving positive-pressure ventilation has a change in a measured filling pressure. True or false: The ventilation may affect both the pressure reading and the heart’s effective filling.

A
True
B
False

True or false

1 point

True or false: Echocardiography can be used to assess ventricular size and function.

A
True
B
False

Open ended

1 point

A patient is hypotensive, has cool skin, and has worsening urine output. What should be assessed promptly, and why is blood pressure alone insufficient to identify the cause?

4 Preload and Afterload Online Quiz Questions

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