1 PA School Flashcards on Cardiac Physiology PA School, created by Elle Ashe on 05/02/2017.
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Created by Elle Ashe
over 7 years ago
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Created by Elle Ashe
over 7 years ago
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Arteries
Arterioles
Capillaries
Venules
Veins
Velocity
Velocity is _________ in the aorta than in the sum of all the capillaries.
Cardiac Output =
Resistance =
Parallel Resistance
Series Resistance
Reynold's Number
Capacitance (Compliance)
The largest decrease in pressure...
Mean pressures in the:
Aorta
Arterioles
Capillaries
Vena cava
Systolic Pressure
Diastolic Pressure
Pulse Pressure
The most important determinant of pulse pressure is
Decreases in capacitance, cause ________ in pulse pressure.
Mean Arterial Pressure
(MAP)
P wave
PR interval
An increase in the conduction velocity by the ___________ nervous system, ___________ the PR interval.
A decrease in the conduction velocity by the ___________ nervous system, ___________ the PR interval.
QRS complex
QT interval
ST segment
T wave
Phase O:
Phase 1
Phase 2
Phase 3
Phase 4
Sinoatrial (SA) node
AV node
Conduction Velocity
Conduction velocity is fastest in the
Conduction velocity is slowest in the
Excitability
Absolute refractory period
Effective refractory period
Relative refractory period
Chronotropic Effects
Dromotropic Effects
The SA node, atria, and AV node have __________ _________ innervation, but the ventricles do not.
The parasympathetic neurotransmitter, ACh
The sympathetic nervous system neurotransmitter is __________ and acts on ___________ receptors.
Norepinephrine has ____________ chronotropic and ___________ dromotropic effects on the heart.
Which organs have ONLY sympathetic innervation?
Where are α1 adrenergic receptors located and what is their mechanism of action?
Where are the α2 adrenergic receptors and what is their mechanism of action?
Where are the β1 adrenergic receptors located and what is their mechanism of action?
Where are the β2 adrenergic receptors located and what is their mechanism of action?
Where are the nicotinic (colinergic) receptors located and what is their mechanism of action?
Where are the muscarinic (cholinergic) receptors located and what is their mechanism of action?
