Normal Electrocardiogram Flashcards
What occurs in the P wave?
Atrial depolarization
What occurs in the QRS complex?
Ventricular depolarization
What occurs in the PR interval?
Time between beginning of atrial depolarization and ventricular depolarization
What occurs in the ST interval?
Segment between ventricular depolarization and repolarization
What is the charge of a cell when there is a depression or spike in the EKG respectively?
Negative
Positive
How many seconds is each small box in an EKG?
,04 seconds
How many small boxes make up a larger box?
5 small boxes
What augmented leads give a positive P, R and T wave?
aVL and aVF
What augmented leads give a negative P, R and T wave?
aVR
What leads look at the lateral wall?
I, aVL, V5, V6
What leads look at the septum?
V1, V2
What leads look at the anterior wall?
V3, V4
What does subendocardial ischemia cause in an EKG?
ST depression
What does transmural ischemia cause in an EKG?
ST elevation
What leads look at the inferior wall?
II, III, aVF
