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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
1,828 total reports7.6% serious outcomes
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1,828
Total Reports
6
Deaths
133
Hospitalizations
7.6
Severity Rate
% serious outcomes
About Cardiac flutter Reports
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%.
Understanding Cardiac flutter in VAERS
•Temporal association only: These reports show Cardiac flutter occurred after vaccination, not necessarily because of vaccination.
•Background rates matter: Many symptoms occur naturally at baseline rates in the population, unrelated to vaccination.
•Reporting variability: Medical terminology may be used differently by various healthcare providers and over time.
•Investigation needed: High-frequency reports may trigger further epidemiological studies to determine causation.
What This Data Shows
Most Associated Vaccines: The vaccines most frequently mentioned in reports with Cardiac flutter. This may reflect usage patterns, not causation.
Severity Patterns: The percentage of reports that involve serious outcomes can help prioritize safety investigations.
Reporting Trends: Changes in reporting frequency over time may reflect increased awareness, media attention, or actual safety signals.
Quick Facts
Reports:1,828
Deaths:6
Hospitalizations:133
Mortality Rate:0.33%
Severity Rate:7.6%
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Data Source
This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.