Saturday, June 1, 2013

Practice EKG Rhythm Strips 142

Identify the following rhythms.

1.


2.


3.













4.


5.













Answers


1.
3rd degree heart block











The rhythm is slightly irregular.   The atrial rate is 68/min and the ventricular rate of 36/min.  There are upright P waves that are not associated with a QRS complex and some of the P waves are buried with the T waves.   No ectopic beats are noted.   PR:  ---,  QRS:  .16 sec,  QT: .52 sec.


2.
Atrial fibrillation













The rhythm is irregular with a rate of 110/min.   There are not any P waves only fibrillatory waves.  a single supraventricular ectopic beat is present, the 5th complex. There is some ST depression and inversion of the T wave in the top lead (II).  PR:  ---,  QRS:  .08 sec,  QT:  .32 sec.


3.
Normal sinus rhythm with trigeminal PACs














The rhythm is irregular due to the PACs.   The rate is 90/min.  The P waves are upright and precede the QRS complexes.  The 3rd, 6th, and 9th complexes are trigeminal PACs and have a P wave that differs in shape from the sinus beats.  PR: .20 sec,  QRS:  .08 sec,  QT:  .36 sec.


4.
1st degree heart block














The rhythm is regular and the rate is 62/min.  There are upright, uniform P waves that precede the QRS complexes.   The PR interval is prolonged.  PR:  .32 sec,  QRS:  .08 sec,  QT:  .44 sec.


5.
Sinus bradycardia




The rhythm is regular with a rate of 46/min.  There are low voltage P waves that precede each QRS complex.  No ectopy is present.  PR:  .12 sec,  QRS:  .08 sec,  QT:  .44 sec.

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