Cardiac Cycle and Pressures Flashcards
1
Q
Steps of Cardiac Cycle
A
- Atrial Contraction
- Isovolumetric contraction
- Rapid ejection
- Reduced ejection
- Isovolumetric relaxation
- rapid filling
- Reduced filling
2
Q
S1
A
Closure of AV valves, beginning of systole
3
Q
S2
A
Passive closure of aortic, pulmonic valves
4
Q
S3
A
Rapid passive ventricular filling, ventricular gallop rhythm in LV heart failure
Can be normal finding in LA, may also be normal in some cats with gallop rhythm
5
Q
S4
A
atrial contraction vibrates stiff walls of ventricles during filling: atrial gallop rhythm indicative of cardiac dz
6
Q
RA Pressures
A
0-2
7
Q
RV Pressures
A
SAP 15-30, Diastolic 2-8
8
Q
PAP
A
15mm Hg MAP
9
Q
Pulmonary Capillaries
A
10mm Hg
10
Q
Pulmonary Venous pressure
A
8mm Hg
11
Q
LA P
A
2-5mm Hg
12
Q
LV pressures
A
100-140 SAP
DAP 3-12
13
Q
Aorta, large arteries
A
100mm Hg
14
Q
Arterioles
A
50mm Hg
15
Q
Capillaries
A
20mm Hg
16
Q
Vena Cava
A
4mm Hg