Antiarrhythmic Flashcards
PACEMAKER of the heart that creates IMPULSES/CONTRACTIONS
SA node
The impulses are __________ due to the
Automatic
Spontaneous generation
It is the movement of the cell from NEGATIVE membrane potential to POSITIVE membrane potential
Depolarization
UNIQUE cells can depolarize __________
By themselves
A HIGHWAY that send depolarization signal to left atria
Is it fast or slow?
Bachmann’s bundle
Fast
The only MAJOR connection between the ATRIA and the VENTRICLE
Atrioventricular node
Does the ATRIA and VENTRICLE contract SIMULTANEOUSLY?
No
What will happen if the ATRIA and VENTRICLE contract SIMULTANEOUSLY?
Squeeze blood against each other
There is DELAY between contractions for
The blood to move forward
The signal in the Purkinje fibers move __________ and in the muscles move __________
Fast
Slow
It is the impulses generated that will trigger the heart to CONTRACT
Action potential
Which is faster Cardiac cells or pacemaker cells
Cardiac cells
In the cardiac cells who does the SQUEEZING of the heart
Cardiac myocytes
What triggers squeezing
Calcium
Little connection between cells
Gap junctions
Does SODIUM channels increase or decrease membrane potential
Increase
What opened due to DEPOLARIZATION
Voltage gated channels
Voltage gated channels causes
Repolarization
What keeps the membrane potential in a PLATEAU
Calcium
Increase in intracellular sodium will
Increase calcium = contraction
In DEPOLARIZATION heart will
Contract
It keeps the heart breathing in a certain RHYTHM or PHASE
Pacemaker cells
It helps determine the VOLTAGE of the cell
Ions
Atrial depolarization
P wave
