Heart compensatory mechanisms that 'save' organ blood flow during shock
"Heart SAVER":
- Sympathoadrenal system
- Atrial natriuretic factor
- Vasopressin
- Endogenous digitalis-like factor
- Renin-angiotensin-aldosterone system
Heart: tropic definitions
- Lusitropic: loose is relaxed. Definition: relax heart.
- Inotropic: when heart wall contracts, moves inward. Definition: contract heart.
- Chronotropic: 'chrono-' means 'time'. Defintion: heart rate (of SA node impulses).
- Dromotropic: only one left, it must be conduction speed by default.
Heart valves: closure sequence
- "Many Things Are Possible":
- Mitral, Tricuspid, Aortic, Pulmonic
Heart valves: sequence of flow
TRIPS BIAS:
- TRIcuspid
- Pulmonary
- Semilunar
- BIcuspid
- Aortic
- Semilunar
JVP: wave form
ASK ME:
- Atrial contraction
- Systole (ventricular contraction)
- Klosure (closure) of tricusps, so atrial filling
- Maximal atrial filling
- Emptying of atrium
Sino-atrial node: innervation
- Sympathetic acts on Sodium channels (SS).
- Parasympathetic acts on Potassium channels (PS).