Basic EKG Tracing Flashcards
What is the first deflection prior to the QRS complex. It represents depolarization of the right and left atrium
P wave
the ____ interval is the time between the start of the P wave and the start of the QRS complex. Normal PR interval is between ____ seconds
PR Interval
0.12-0.2 seconds
What is the name for the combination of three of the graphical deflections seen on a typical EKG that represents depolarization of the ventricles?
It is usually the central and most visually obvious part of the EKG.
QRS complex
_____ follows the QRS complex. It represents the repolarization of the ventricles.
T wave
____ starts at the QRS complex and ends at the end of the Twave.
QT interval
Normal QRS duration is less than how many seconds?
.12 seconds
What represents the time of ventricular activity including both depolarization and repolarization?
QT interval
Normal QT interval is how many seconds?
0.36-0.44 seconds
What is the segment between the end of the QRS complex and the start of the T-wave.
ST segment
True/ False
ST segment should be at the same level on the EKG tracing as the PR interval.
True
If the ST segment dips does not come back to the same level as the PR interval line it is termed what? What does this represent?
ST depression
Represents the start of myocardial ischemia
What is it called if the ST segment elevates and stays elevated above the PR interval line? what does this represent?
ST Elevation
represents full thickness myocardial infarction
Normally T waves are upright except in what lead?
V1
If T waves are turned upside down and resemble a U this is termed what? and what does this represent?
T-Wave inversion
This could represent ischemia and should be of concern.
Leads I, aVL, V5-V6 represents what?
the lateral aspect of the heart and receives blood from the LCx
