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The rate of death was significantly higher in patients with any VT/VF compared with those without it (90-day death, 23.2 percent vs. The majority of VT/VF episodes (90 percent) occurred within 48 hours, and 64 percent occurred before the end of catheterization. Of the patients in the trial, VT/VF occurred in 5.7 percent.
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The patients were categorized into four groups: no VT/VF VT/VF any time early VT/VF, before the end of cardiac catheterization and late VT/VF, after the end of cardiac catheterization.
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Mehta, M.D., M.S., of the Duke Clinical Research Institute, Durham, N.C., and colleagues evaluated the association of VT/VF and its timing with the risk of death at 30 and 90 days in 5,745 patients with STEMI undergoing PCI at 296 hospitals in 17 countries. The incidence and outcomes of sustained ventricular tachycardia or fibrillation (VT/VF irregular, rapid abnormal contractions of the ventricles) on patients with ST elevation myocardial infarction (STEMI a certain pattern on an electrocardiogram following a heart attack) undergoing a coronary angioplasty or stent placement (percutaneous coronary intervention - PCI) have not been well understood, according to background information in the article.