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Premature ventricular contraction-induced cardiomyopathy.
Andrea K Y Lee1, Marc W Deyell
1Heart Rhythm Services, Department of Medicine, Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada.
Current Opinion in Cardiology
|November 25, 2015
Summary
Frequent premature ventricular contractions (PVCs) can cause cardiomyopathy. Catheter ablation is effective in reducing PVCs and improving heart function, but optimal treatment indications require further study.
Area of Science:
- Cardiology
- Electrophysiology
- Heart Failure
Background:
- Growing interest in the link between frequent premature ventricular contractions (PVCs) and cardiomyopathy.
- Novel concept suggesting PVCs may cause or contribute to cardiac dysfunction.
Purpose of the Study:
- To review recent advancements in understanding PVC-induced cardiomyopathy.
- Evaluate the current evidence on the relationship between PVCs and left ventricular dysfunction.
Main Methods:
- Literature review of recent studies on PVC-induced cardiomyopathy.
- Analysis of predictors, treatment efficacy, and outcomes.
Main Results:
- Key predictors of PVC-induced cardiomyopathy include PVC burden and QRS duration.
- Catheter ablation efficacy for PVC reduction ranges from 60-88%, with significant improvement in left ventricular ejection fraction (47-100%).
- Emerging evidence suggests lower PVC burdens may also lead to cardiomyopathy.
Conclusions:
- Substantial evidence supports a causal role for frequent PVCs in left ventricular dysfunction.
- Effective therapies for PVCs are available, but optimal treatment guidelines are still under development.
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