Are Unifocal Pvcs Dangerous?

If they occur more frequently than every 4th beat the condition can be serious and possibly require treatment. Multifocal PVC's are also more dangerous then unifocal. If they appear in groups of two or more together (coupled), the situation could also be dangerous.

What are unifocal PVCs?

PVS may be unifocal or multifocal. Unifocal PVCs arise from the same irritable site in the ventricle. Multifocal PVCs result from irritation in multiple ventricular cells; each contraction looks different on the ECG. (See the waveforms below.)

What percentage of PVCs are dangerous?

Although the range differs from person to person, patients with PVCs that comprise 20 percent or more of total heartbeats typically are most at risk for some of the more serious complications associated with the condition.