EKG Flashcards
Inferior Leads
Lead II, III and aVF
Left Lateral Leads
Lead I, aVL
Right Sided Lead
Lead aVR
P wave
Atrial Depolarization
QRS wave
Ventricular depolarization
T wave
Ventricular repolarization
+60*
Lead II
+120*
Lead III
+90*
Lead aVF
0*
Lead I
-30*
Lead aVL
-150*
Lead aVR
Anterior and septal group
Leads V1, V2, V3, V4
Left Lateral Group
Leads I, aVL, V5, V6
Inferior Group
Leads II, III, aVF
PR interval
Normally 0.12-0.2 seconds- Time between the start of atrial depolarization and the start of the QRS depolarization
Q wave
Normal septal Q wave should not have an amplitude greater than 0.1mV Can be seen in leads I, aVL, V5, V6 sometimes very small in V3 and V4
ST segment
The horizontal line between the end of depolarized QRS and the Start of the Repolarizing T wave
QT interval
Time from beginning of Ventricular depolarization to the end of ventricular repolarization
Enlargement
increase in dilation due to volume overload
Hypertrophy
increase in muscle mass due to pressure overload
Interval
a portion of EKG that includes at least 1 wave and the isoelectric line
Segment
A portion of the EKG that is between 2 waves and is only the isoelectric line
Normal Sinus Rhythm
