All electrical current in the heart should originate here.
SA Node
100
Cardiac muscle has three special properties.
automaticity, excitability, conductivity.
100
When electricity moves downward in the heart, it moves how on an ECG?
up
100
What connects arteries to capillaries?
arterioles
200
what valves separate the right ventricle from the lungs?
Pulmonary semilunar and pulmonary valves
200
The point at where the electrical conduction "splits" into two separate pathways.
AV Junction
200
means the ability to receive electrical current.
excitability
200
The QRS Complex represents what?
ventricular depolarization.
200
Arteries carry blood which direction?
away from the heart
300
What is the largest part of the heart?
Left Ventricle
300
The intrinsic rate of the AV Node
40-60
300
What type of muscle is the heart?
Cardiac Muscle
300
An elevated J point of greater than 2mm may indicate what?
An active heart attack. STEMI
300
Name the two arteries that carry deoxygenated blood.
pulmonary and umbilical
400
Blood is oxygenated at what level?
alvelolar
400
A P-R Interval of greater than .20 seconds is considered to be what?
1st degree Atrio-ventricular block
400
Cardiac muscle is striated in appearance. True or false?
False
400
The QRS Duration should be no greater than what?
0.12 seconds
400
if you were to lay all of your capillaries end to end, they would reach around the world how many times?
Two
500
What supplies the heart with oxygenated blood?
Coronary Arteries
500
When a cardiac cell fires out of turn it is called what?
an eptopic foci.
500
Cardiac muscle can be stimulated by certain chemicals which the brain induces to be released. The most common is what?
Epi
500
If you are reading an ECG and are presented with pathological left axis deviation as well as a right bundle branch block, what kind of block do you have?