Quick ECG Interpretation Cheat Sheet PDF

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Summary

How to systemically interpret an ECG...

Description

Quick ECG Interpretation Cheat Sheet 1. Are the QRS complexes equally spaced apart? 

Yes-Normal Rhythm



No- Arrhythmia (Sinus or abnormal)

2. Is there a P-wave for every QRS? 

Yes- Sinus Rhythm



No- Atrial Arrhythmia or ectopic beat

3. Is the heart rate between 60-100 bpm? 

Yes- Normal



Less than 60 bpm- bradycardia



Over 100 bpm- tachycardia

4. Does the PR interval measure between .12-.20 seconds? 

Yes- normal



Longer than .20 seconds- conduction delay/ heart block



Shorter than .12 seconds- possible ectopic beat or atrial arrhythmia

5. Is the QRS narrow, less than 2.5 small boxes? 

Yes- normal QRS



Wider than 2.5 small boxes- Bundle branch or fascicular block

6. Is the ST segment isoelectric with the PR interval? 

Yes- No lack of blood flow to the heart



Depressed- Possible blockage in one of the arteries



Elevated- Lack of blood flow to the heart (HEART ATTACK)

7. Is the cardiac axis within normal range? 

Yes- between -15 and 105 degrees



RAD- 105 to 180 degrees



LAD- -15 to -90 degrees

Electrode Placement Cheat Sheet

Electrode

Placement

V1

4th intercostal space to the right of the sternum

V2

4th intercostal space to the left of the sternum

V3

Midway between V2 and V4

V4 V5

5th intercostal space at the midclavicular line Anterior axillary line at the same level as V4 and V5

V6

Midaxillary line at the same level as V4 and V5

RL

Anywhere above the right ankle and below the torso

RA

Anywhere between the right shoulder and the wrist

LL

Anywhere above the left ankle and below the torso

LA

Anywhere between the left shoulder and the wrist

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