Cardiac Cycle and Valve Function Flashcards
1
Q
One way valves between cardiac chambers: what happens if P1 = P2?
A
No flow occurs
2
Q
One way valves between cardiac chambers: what happens if P1 > P2?
A
Flow occurs (from P1 - P2)
3
Q
One way valves between cardiac chambers: what happens if P1 < P2?
A
No flow occurs
4
Q
When is raised jugular venous pressure seen?
A
In right-sided heart failure
right atrium - connected to vena cava - connected to jugular vein
5
Q
What are the 5 phases of the cardiac cycle?
A
- Isovolumic contraction
- Ventricular ejection
- Isovolumic relaxation
- Ventricular filling
- Atrial contraction
6
Q
What is the first heart sound caused by?
A
AV valves closing (mitral and tricuspid)
7
Q
What is the second heart sound caused by?
A
Closing of the semi-lunar valves (aortic and pulmonary valves closing)
