Cardiac Cycle Flashcards
(9 cards)
1
Q
In what ORDER does the CARDIAC CYCLE OCCUR?
A
Artrial Diastole—>Ventricular Diastole + Atrial Systole—> Ventricular Systole
2
Q
Describe ARTIERAL DIASTOLE
A
- Atria are Relaxed and blood enters via SVC
- Pressure slowly increases causing AV to open
- Blood passively enters Ventricles
3
Q
Describe VENTRICULAR DIASTOLE
A
- Ventricles are Relaxed
- Blood is passively entering from atria due to pressure gradient
- SL valves are closed
4
Q
Describe ATRIAL SYSTOLE
A
- Atria Contract forcing blood into Ventricles
- AV forced open
5
Q
Describe VENTRICULAR SYSTOLE
A
- Pressure in Ventricles increases so AV closes and SL valves open
- Ventricles Contract forcing blood to travel to Aorta/PA
6
Q
Define END-DIASTOLIC VOLUME
A
Volume of blood in a ventricle after Diastole
7
Q
Define END-SYSTOLIC VOLUME
A
Volume of blood in a Ventricle after Systole
8
Q
What is the EQUATION for STROKE VOLUME?
A
SV= EDV-ESV
9
Q
A
