CVS 1&2 Flashcards
Conductivity
Domotropic Effect
Irritability/excitability
Chronotropic effect
Contractility
Inotrophic effect
Innermost layer of the heart
Endocardium
Thickest layer of the heart
Myocardium
Outermost layer of the heart
Pericardium
Adherent to the lungs
Parietal pericardium
Adherent to the heart
Visceral Pericardium
No overlapping
H zone
Area of Thin filament
I band
Thick/myosine filament
A band
“Crossbridge”
Myosine head
Node of Keith and flack
SA node
Located below the superior vena cava and right atrium
SA node
Node that has no actin and myosin and not specialized for CONTRACTION
SA node
Node of kent and tawara
AV node
Conduction rate : 0.05 per minute
AV node
Only area where we can conduct impulses from atria to ventricle
AV node
Conduction rate: 1 millisecond
Bundle of his
Has the fastest conduction velocity of 4 millisecond
Purkinje fibers
It’s conduction depolarizes the whole atrial muscle tissue
SA node
Anterior internodal pathway
Bachmann Tract
Middle internodal pathway
Wenckebach Tract
Posterior Internodal Pathway
Thorel tract
In the AV node, the only way to transmit impulses is thru the
Bundle of His
Depolarizes the interventricular septum
AV node
T or F: the Postero basal area of the ventricle will be the first to repolarize
TRUE
the last to depolarize will be the first to repolarize
Parasympathetic NS, fibers come from
Vagus nerve ( extrinsic innervation )
Right vagus is distributed to
SA node