preload_afterload - Sheet1 Flashcards
1
Q
What is Preload?
A
The stretch of the ventricles before contraction.
2
Q
What is Afterload?
A
The resistance the heart has to overcome to pump blood.
3
Q
What increases Preload?
A
- Longer diastole (filling time)
- Increased venous return
- Heart muscle damage
- Kidney failure (fluid overload)
4
Q
What increases Afterload?
A
- High blood pressure (hypertension)
- Pulmonary hypertension
- Aortic stenosis
5
Q
What happens when Preload increases over time?
A
The heart becomes overstretched, less effective, and can lead to heart failure.
6
Q
What happens when Afterload increases over time?
A
The heart muscle thickens, becomes less flexible, and can lead to heart failure.
7
Q
How does Preload affect blood flow?
A
More Preload (stretch) means more blood is pumped forward.
8
Q
How does Afterload affect blood flow?
A
More Afterload means the heart has to work harder to pump blood.
9
Q
What conditions are associated with increased Preload?
A
- Fluid overload
- Heart failure
- Kidney failure
10
Q
What conditions are associated with increased Afterload?
A
- Hypertension
- Aortic stenosis
- Pulmonary embolism
