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Exercise-induced ventricular arrhythmias and cardiovascular death
James Beckerman1, Anima Mathur, Stephen Stahr
1Division of Cardiovascular Medicine, Stanford University Medical Center, Palo Alto, California, USA.
Summary
Exercise-induced ventricular arrhythmias (EIVA) predict cardiovascular death, especially when combined with resting premature ventricular complexes (PVCs). This study clarifies the significance of EIVA in patient outcomes.
Area of Science:
- Cardiology
- Exercise Physiology
Background:
- Exercise-induced ventricular arrhythmias (EIVA) are common during exercise testing.
- Clinical guidelines lack clarity on the prognostic significance of EIVA.
Purpose of the Study:
- To investigate the clinical significance of EIVA in predicting cardiovascular mortality.
- To determine if EIVA are independent predictors of adverse cardiovascular events.
Main Methods:
- Retrospective analysis of prospectively collected data from 5754 male veterans undergoing exercise testing.
- EIVA defined by frequent premature ventricular complexes (PVCs) or runs of PVCs during ECG.
- Cardiovascular mortality assessed over a mean follow-up of 6 years.
Main Results:
- EIVA occurred in 7.4% of patients, associated with higher cardiovascular mortality (17% vs 9.0%).
- Patients with EIVA had more cardiovascular disease, resting PVCs, and exercise-induced ischemia.
- EIVA independently predicted cardiovascular death, with the highest risk seen when combined with resting PVCs.
Conclusions:
- EIVA are significant independent predictors of cardiovascular mortality.
- The combination of resting PVCs and EIVA confers the highest risk for cardiovascular death.