|Atrial fibrillation with bigeminy|
The rhythm is is irregular with a rate of 100/min. The P waves are absent and there are fibrillatory/flutter waves between the QRS complexes. A unifocal PVC is seen every other beat. A compensatory pause follows the PVC. PR: ---, QRS: .08 sec, QT: .32 sec.
|Normal Sinus Rhythm with Unifocal PVCs|
The ectopic beats give this strip an irregular rhythm. The rate is 70/min (Count the R waves in a 6 second strip and multiply by 10.) The P waves are uniform, upright, and are associated with a QRS complex. The ST segment is down slopping. Two unifocal PVCs are seen and they are followed by a compensatory pause. PR: .16 sec, QRS: .12 sec, QT: .28 sec.
|Ventricular paced with unifocal PVCs|
The rhythm is irregular with a rate of 80/min. The P waves are absent and some fibillatory waves are seen between the QRS complexes. Three unifocal PVCs are seen every fifth beat. They are followed by a compensatory pause. Ventricular pacer spikes are seen before the QRS complexes. The T wave is inverted and the QT interval is prolonged. PR: ---, QRS: .16 sec, QT: .52 sec.
|Normal sinus rhythm Quadrageminal PVCs|
The rhythm is irregular due to the PVCs. The rate is 100/min. The P waves are positive and are merged with T waves of the preceding complex. Interpolated unifocal PVCs are seen every 4th beat. The ST segment is elevated in the VI lead with some reciprocal depression in lead II. PR: .20 sec, QRS: .16 sec, QT: .44 sec
The rhythm strip is irregular with a rate of 80/min. There are small upright P waves and they are associated with a QRS complex. Unifocal PVCs are seen in a trigeminal pattern. The QRS complex in the bottom V1 lead has an RSr morphology suggesting a RBBB. A compensatory pause follows each PVC. PR. 12 sec, QRS: .16 sec, QT: .44 sec.