14, Cardiac physiology Flashcards
1
Q
S1 sound
S2 sound
A
S1. Mitral valve closure
S2. Aortic valve closure
2
Q
Laplace formula
A
Pressure x Radius / 2H (wall thickness)
3
Q
Phospholamaban MoA
A
Ca channel inhibition. Relaxation (lusitropy)
4
Q
B J reflex
A
Strech in the left wall
Bradicardia + Coronary vasodilation + hipotension
Prevention.Bb fluids
5
Q
Brainbridge reflex
A
Increase right side pressure
Decrease parasympathetic
Increase HR
6
Q
Cushing relfex
A
Increase ICP
Increase HR, BP, Contractility
7
Q
Oculocardiac reflex
A
V - Gasserion ganglion - Bradicardia
8
Q
Valsalva reflex
A
Increase intrathoracic pressure
Increase CVP
Decrease Venous return
9
Q
Dominant collagen type
A
3
10
Q
Fast vs Slow fibers
A
Fast: Purkinje fibers Atrial/ventricular cardiomyocytes
Slow. AV/SA node
11
Q
Fast fibers vs slow phases
A
- Na
- Ca
2.Ca - K
- Repolarization
In slow. No 1. 0 less step. 2 and 3 no difference
