Reading...
Play button
Play button
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;
15 Cards in this Set
- Front
- Back
|
the electrical stimulation that causes systole or mechanical contraction
|
depolarization
|
|
|
electrical relaxation
|
repolarization
|
|
|
mechanical relaxation
|
diastole
|
|
|
in the ECG, it respresents atrial depolarization
|
P wave
|
|
|
represents ventricular depolarization
|
QRS complex
|
|
|
represents ventricular repolarization
|
T wave
|
|
|
is thought as repolarization fo the purkinje fibers; seen in pts w/ hypokalemia, HTN, or heart disease
|
U wave
|
|
|
normal PR interval
|
0.12 to 0.20 seconds
|
|
|
total time for ventricular depolarization and repolarization
|
QT interval
|
|
|
prolonged QT interval might lead to
|
torsades de pointes
|
|
|
usually given to treat symptomatic bradycardia
|
atropine
|
|
|
usualy dose of atropine
|
0.5 mg IV bolus q 3-5 mins; max of 3 mg (6 shots)
|
|
|
treatment of acute onsen a-fib
|
adenosine
|
|
|
treatment options for a-flutter
|
rapid atrial pacing
adenosine (6mg bolus, 12mg) then magnesium, diltiazem or Beta blockers if all else fail, electrical cardioversion |
|
|
in cases of a-fib and you notice that the QRS is wide and ventricular rhythm is irregular, then suspect...
|
a-fib with accessory pathway
|
