EKG Rhythm Strips 01

1.

2.

3.

4.                                                                                                                                                                  

5.

Answers:
1.

2nd degree heart block type I

2nd degree heart block type I.  Notice PR interval increases on the conducted beats.  Then there is an extra non-conducted P wave present without QRS complex following.

2.

Atrial fibrillation

Atrial fibrillation.   Rhythm is irregular without identifiable P waves.  Rate is around 110

3.

Idioventricular rhythm

Idioventricular rhythm.   The absence of P waves and a wide QRS complex indicates that this rhythm is ventricular in nature.  If it were from a junctional focus then the QRS complex would be narrower.

4.

Juctional rhythm

Juctional rhythm.  This rhythm is characterized by a narrow QRS complex without P waves.  Recall that with a junctional rhythm the P wave may be inverted, absent, or follow the QRS complex.  The rhythm is regular and the rate is 45 beats/min.

5.

Bradycardia with sinus arrhythmia

Bradycardia with sinus arrhythmia.  P wave before each complex with a normal PR interval tells you that this rhythm is sinus in origin.  The rhythm is irregular with an R to R interval that varies.  The usual definition for sinus arrhythmia is a P-P interval that varies by more than .012sec or 120 msec (3 small boxes) and the presence of "normal," sinus, appearing P waves.


Reviewed 2/28/16