#1
What is the normal range for ejection fraction in a healthy individual?
50-60%
ExplanationNormal ejection fraction range in a healthy individual.
#2
Which of the following imaging modalities is commonly used to measure ejection fraction?
Ultrasound (Echocardiography)
ExplanationUltrasound, specifically echocardiography, is commonly used for ejection fraction measurement.
#3
Which chamber of the heart primarily contributes to stroke volume?
Left ventricle
ExplanationLeft ventricle primarily contributes to stroke volume.
#4
What does a low ejection fraction indicate?
Heart failure
ExplanationA low ejection fraction indicates heart failure.
#5
What is the term for the percentage of blood pumped out of the heart with each contraction?
Ejection fraction
ExplanationEjection fraction is the term for the percentage of blood pumped out of the heart with each contraction.
#6
What is the term for the volume of blood remaining in the ventricle at the end of diastole?
End-diastolic volume
ExplanationEnd-diastolic volume is the term for the volume of blood remaining in the ventricle at the end of diastole.
#7
What does ejection fraction measure?
The volume of blood pumped by the heart with each beat
ExplanationEjection fraction measures the volume of blood pumped by the heart per beat.
#8
A patient with an ejection fraction of 25% would be classified as having which condition?
Heart failure with reduced ejection fraction (HFrEF)
ExplanationEjection fraction of 25% indicates heart failure with reduced ejection fraction (HFrEF).
#9
What is the formula to calculate ejection fraction?
Stroke volume / End-diastolic volume
ExplanationEjection fraction is calculated as stroke volume divided by end-diastolic volume.
#10
What effect does an increase in afterload have on ejection fraction?
Decreases ejection fraction
ExplanationIncreased afterload leads to a decrease in ejection fraction.
#11
Which of the following factors can influence ejection fraction?
All of the above
ExplanationVarious factors, including preload, afterload, and contractility, can influence ejection fraction.
#12
What does an ejection fraction of 50% mean?
Half of the blood is pumped out of the heart with each contraction
ExplanationAn ejection fraction of 50% means that half of the blood is pumped out of the heart with each contraction.
#13
Which of the following medications is commonly prescribed to improve ejection fraction in heart failure patients?
Beta-blockers
ExplanationBeta-blockers are commonly prescribed to improve ejection fraction in heart failure patients.
#14
Which condition is characterized by a normal ejection fraction but impaired relaxation of the heart muscles?
Restrictive cardiomyopathy
ExplanationRestrictive cardiomyopathy is characterized by normal ejection fraction but impaired relaxation of the heart muscles.
#15
What does an ejection fraction of less than 40% typically indicate?
Heart failure with reduced ejection fraction (HFrEF)
ExplanationEjection fraction less than 40% typically indicates heart failure with reduced ejection fraction (HFrEF).
#16
Which of the following is a symptom commonly associated with reduced ejection fraction?
Edema (swelling)
ExplanationEdema (swelling) is a common symptom associated with reduced ejection fraction.
#17
What is the primary mechanism by which beta-blockers improve ejection fraction in heart failure patients?
Inhibiting sympathetic activity
ExplanationBeta-blockers improve ejection fraction by inhibiting sympathetic activity.
#18
Which of the following is a common cause of reduced ejection fraction?
Atrial fibrillation
ExplanationAtrial fibrillation is a common cause of reduced ejection fraction.