|Complete heart block|
|Normal sinus rhythm|
|Normal sinus rhythm with a multifocal couplet|
The P waves are upright and are associated with a QRS complex. The P waves are wide suggesting left atrial enlargement. There are multifocal PVCs present. A multifocal couplet follows the 4th complex. PR: .18 sec, QRS: .12 sec, QT: .28 sec. Interpretation: Normal sinus rhythm with a multifocal couplet. Notice the drop in the arterial blood pressure following the couplet.
|Sinus bradycardia, sinus arrhythmia with a PAC|
The rhythm is irregular with a rate of 50/min. There are upright P waves before each QRS. The P wave of the 2nd complex has a different shape than the other P waves which indicates that it not a sinus P wave. The early beat of the 2nd complex is a PAC. The QRS complexes are narrow. PR: .16 sec, QRS: .08 sec, QT: .48 sec. Interpretation: Sinus bradycardia, sinus arrhythmia with a PAC
The rhythm is regular with a rate of 150/min. No P waves are seen. The QRS complex is wide suggesting a ventricular rhythm. No ectopic beats are seen. PR: ---, QRS: .16 sec, QT: .36 sec. Interpretation: Ventricular tachycardia