ECG - Atrial

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ECG - Atrial by Mind Map: ECG - Atrial

1. Normal Sinus

1.1. From SA Node

1.2. P wave before QRS

1.3. PR - 0.12 - 0.20

1.4. QRS - same shape and size - < 0.12

1.5. Rhythm = P-P & R-R; Regualr

1.6. Rate = 60 - 100 bpm

2. Atrial Tachycardia

2.1. From Atria

2.2. P wave before QRS

2.2.1. May be buried in preceding T wave

2.3. Rate = 151 - 250 bpm

3. Atrial Fibrillation

3.1. From Atria

3.2. No distictive P wave

3.2.1. No PR interval

3.3. R - R irregular

3.4. Atrial Rate:

3.4.1. 350 - 500

3.5. Ventricular Rate:

3.5.1. < 60 = Slow ventricular response

3.5.2. 60 - 100 = Controlled A. Fib

3.5.3. 101 - 150 = Rapid ventricular response

3.5.4. > 150 = Uncontrolled A. Fib

4. Premature Atrial Contraction

4.1. From Atria

4.2. P wave premature

4.3. PR interval varies

4.4. Usually followed by a pause

4.4.1. Compensatory if the next heart beat comes in on time

4.4.2. Non-Compensatory if the next heart beat doesn't come in on time

5. Atrial Flutter

5.1. From Atria

5.2. P waves not present

5.3. Flutter waves

5.3.1. Saw toothed in shape; size may vary

5.4. PR interval cannot be measured

5.5. Rhythm regular except with varying block

5.6. Atrial Rate:

5.6.1. 250 - 350

5.7. Ventricular Rate:

5.7.1. 60 - 100