PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The LV normally is able to eject about 60% of the blood volume left in the ventricles at the end of relaxation or diastole.
|
|
|
It refers to the volume of blood ejected per beat.
|
|
|
It refers to the number of beats per minute.
|
|
|
All of the above.
|
Detailed explanation-1: -Left ventricular ejection fraction (LVEF) Ejection fraction typically refers to the left side of the heart. It shows how much oxygen-rich blood is pumped out of the left ventricle to most of the body’s organs with each contraction. LVEF helps determine the severity of dysfunction on the left side of the heart.
Detailed explanation-2: -For example, an ejection fraction of 60% means your heart is pumping 60% of your blood out of your left ventricle (its main pumping chamber) every time your heart beats. Generally, a normal range for left ventricular ejection fraction is between 55% and 70%.
Detailed explanation-3: -Patients with heart failure usually have an ejection fraction of 40% or less. As an example, if your left ventricle ejection fraction (LVEF) is 65%, that means that 65% of the amount of blood in the left ventricle is pumped out with each contraction of your heart.