Flashcards in musch 1 Deck (24):
what are the 3 methods of oxygen and nutrients to tissue?
3. hormonal mechanism
what does a Swan-Gantz catheter measure?
pulmonary wedge pressure
Where is CvO2 sampled from?
only the pulmonary artery
Where is the CasO2 sampled from?
sampled from any artery except the pulmonary artery
Qrv ____ Qlv
Qrv = Qlv (equal output)
HRxSVrv _____ HRxSVlv
HRxSVrv = HRxSVlv (equal stroke volume)
what is the RV?
volume pump (thin wall)
what is the LV?
pressure pump (thick wall)
is cardiac muscle voluntary or involuntary?
are cardiac muscle cells shorter or longer than skeletal muscles cells?
do cardiac muscle cells have more or less mitochondria than skeletal muscle cells?
does preload have a positive or negative effect on stroke volume?
does contractility have a positive or negative effect on stroke volume?
does afterload have a positive or negative effect on stroke volume?
end - diastolic volume is a measure of what?
end - diastolic volume is dependent on what?
LVEDP and venous return
stimulating a beta-1 receptor does what to HR?
stimulating a muscarinic receptor does what to HR?
what is the neurotransmitter for the sympathetic nervous system?
what is the neurotransmitter for the parasympathetic nervous system?
do the pacemaker cells of the heart contract?
effects of norepi and epi on ventricular chromotropic state
beta-1 receptor -> increases CAMP ->protein kinase
1. funny channel opens: increase Na+ influx
2. calcium channel opens: increase Ca++ influx
3. increases the rate of depolarization
effects of Ach on ventricular chromotropic state
muscarinic receptor -> increase K+ permeability and decrease Ca++ permeability -> decreases rate of depolarization