Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
please trace electrical current running through the heart starting with the SA node
|
SA node
Bundle of HIS Left and right bundles Left bundle further divides to: Anterior superior fascicle and Posterior Inferior Fasicle |
|
do areas of that do not have automaticity conduct as quickly as those that do? what is the importance of this?
|
NO!
this can show time intervals being prolonged |
|
please list what occurs at point 1
|
DEPOLARIZATION OF SA NODE
|
|
please list what occurs at point 2
|
P WAVE: depolarization of the right and left atrium
|
|
please list what occurs at point 3
|
DEPOLARIZATION OF AV NODE
|
|
please list what occurs at point 4
|
QRS WAVE: depolarization of septum, right, and left ventricles
|
|
Le Bois
|
wood
|
|
please list what occurs at point 6
|
T WAVE: repolarization of ventricles
|
|
what causes the PR interval?
|
slow conduction velocity across AV node
|
|
measuring what interval can alert you to WPW (Wolff Parkinson White), 1 degree AV block or other potential blocks?
|
PR interval
|
|
What can give you a clue about WPW, IVCD, LBBB, or RBBB?
|
QRS duration
|
|
what is the normal PR interval?
|
.12-.20 seconds
|
|
what is the normal QRS duration?
|
<.10 seconds
|
|
what is the normal QT interval?
|
1/2 RR
what is RR? distance from the start of one QRS to another |
|
where does the QT interval start/end
|
start: beginning of QRS
end: end of the T wave |
|
what are some of the possible implications of prolonged QT interval?
|
electrolyte imbalance, drug intox, myocardial ischemia, etc.
|
|
draw Einthoven's Triangle
|
|
|
draw Einthoven's Triangle
|
|
|
Le Plastique
|
plastic
|
|
draw the hexaxial system
|
|