Not necessarily: Much more important than the location is the frequency. Infrequent pvcs are common and rarely dangerous. Frequent pvcs have greater potential to cause serious rhythm disturbances, regardless of the ventricle of origin. Locating the origin is important mainly in deciding if there is a single focus, and for cardiologists who are considering (relatively rare) ablation (destruction) of such a focus.
Answered 1/27/2012
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