Premature Ventricular Complex Quadrigeminy | Reference Guide.

EKG Features

Rate: The underlying rate
Rhythm: Irregular
P Wave: Absent
PR Interval: Not measurable
QRS: Wide (> 0.10 sec), bizarre appearance

Premature ventricular contraction quadrigeminy are extra, abnormal heartbeats originating in the Purkinje fibers of the ventricles. The PVC occurs with every fourth heart beat. Patients may feel a PVC as a skipped beat or palpitation. Single beat premature ventricular contractions are very common and can often be asymptomatic in healthy patients.
External Source: http://www.cnn.com/HEALTH/library/premature-ventricular-contractions/DS00949.html
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