Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.
Cardiac flutter appears in 1,828 VAERS reports across all vaccines. Of these, 6 reports also mentioned death and 133 involved hospitalization. The severity rate (deaths + hospitalizations as a percentage of reports) is 7.6%. The top vaccines associated with this symptom are COVID19, COVID19-2, UNK. Remember: VAERS reports show temporal association, not causation.
Cardiac flutter has been reported 1,828 times in VAERS from 1990 to 2026.
Of these reports, 6 were associated with death (0.33%) and 133 involved hospitalization.
The overall serious outcome rate (death or hospitalization) for reports mentioning Cardiac flutter is 7.6%.
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.