Physiological Basis For ECG & Basic ECG Flashcards
SA node causes _______________ to ____________________ from ___________ to ___________ - _____ wave
Atria Depolarize Right Left P
_______________ delays signal-________ interval
AV node
PR
Ventricles ________________ generally from ___________ to _____________ and from _____________ to _____________-____________ complex
Depolarize Right Left Apex Base QRS
Action potential phase _____ delays __________________ of __________________-_______ segment
2
Repolarization
Ventricles
ST
Ventricles _______________ generally from ______________ to ______________ and ______________ to ______________-__________ wave
Repolarize Left Right Base Apex T
The __________ wave represents phase 0 of the AP’s spreading through the atrial muscle
P
The _____________ complex represents phase 0 of the AP spreading throughout the ventricles
QRS
The _________ wave represents phase 3 or repolarization of ventricular muscle fibers spreading through the ventricles
T
PR segment
End of atrial depolarization until beginning of QRS
ST segment
End of QRS until beginning of T wave
PR interval
Beginning of P wave until beginning of QRS
QT interval
Beginning of QRS until end of T wave
Heart rate on ECG
300, 150, 100, 75, 60, 50
OR
60/(big boxes * 0.2) + (small boxes * 0.04)
Standard (bipolar) limb leads
1-right arm to left arm
2-right arm to left leg
3-left arm to left leg
Augmented limb leads
-aVF (augmented vector, foot) (RA+LA) to LL -aVR (augmented vector, right) (LL+LA) to RA -aVL (LA) (augmented vector, left) (LL+RA) to LA
