ECG Flashcards
Name the 7 aspects to a standard ECG checklist.
Rate
Rhythm
Axis
Intervals
QRS morphology
ST segments
T waves
Other
What voltage does a small box typically represent on an ECG?
0.1 mV
What are two ways to calculate HR from an ECG?
HR = 300/number of big boxes between peaks
HR = 1500/number of little boxes between peaks
What leads generally represent the lateral heart and what is its corresponding artery?
Leads: I, aVL, V5 V6
Circumflex A
What leads generally represent the inferior hear and what is its corresponding artery?
Leads: II, III, aVF
RCA
What leads generally represent the anterior heart and what is its corresponding artery?
Leads: V3, V4
LAD
What leads generally represent the septum and its corresponding artery?
Leads: V1, V2
LAD
Where are the positive and negative axis of lead I?
Negative - right arm
Positive - left arm
Where are the positive and negative axis of lead II?
Negative - right arm
Positive - left leg
Where are the positive and negative axis of lead III?
Negative - left arm
Positive - left leg
What is the normal interval of time represented by a standard ECG?
10 seconds
What is the cut off for a left axis deviation?
<-30 degrees
What is the cut off for right axis deviation?
> 90 degrees
What is the range for a normal P interval?
60-100 msec
What is the range for a normal PR interval?
120-200 msec
