Left ventricular function among patients with a prior myocardial infarction is not significantly affected by multiple radio frequency catheter ablation if the lesions are confined to the area of the infarct.
Doctors should, however, adopt a cautious approach in using the technique by confining ablation lesions to areas of scar, say clinicians at the Department of Internal Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States.
Their conclusions are based on a study among 55 men and 7 women, average age 67, who had radio frequency (RF) ablation for ventricular tachycardia (VT) late after myocardial infarction (MI).
The clinicians point out that RF ablation of VT late after MI can be a successful intervention but, it involves multiple applications and results in long lines of lesions. Although the impact on left ventricular function is potentially important, it is not well defined. Among the 62 patients, left ventricular ejection fraction (LVEF) was quantified from digital echocardiograms which was carried out within a week before, and less than 72 hours after, ablation. Patients received a mean of 25.6 RF lesions.
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