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Report #2854779

Received Aug 19, 2025

A note on interpretation. VAERS reports are unverified and may be incomplete or coincidental. A report does not establish that a vaccine caused an event, and counts should not be used to calculate incidence or infer causation. Full disclaimer

Overview

Sex
Male
Age
Age unknown
State
—
Recovered
Not recovered
Vaccinated
—
Onset
—
Days to onset
—
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
COVID19COVID19 (COVID19 (MODERNA))MODERNAUNK—IM

Symptoms (1)

Cardiac ventricular thrombosis

Symptom narrative

developed a blood clot in his heart caused by the Moderna Covid vaccine; This spontaneous case was reported by a consumer and describes the occurrence of CARDIAC VENTRICULAR THROMBOSIS (developed a blood clot in his heart caused by the Moderna Covid vaccine) in a male patient of an unknown age who received SPIKEVAX NOS (SPIKEVAX NOS) for COVID-19 prophylaxis. No Medical History information was reported. On an unknown date, the patient received dose of SPIKEVAX NOS (SPIKEVAX NOS) (Intramuscular use) 1 dosage form. On an unknown date, the patient experienced CARDIAC VENTRICULAR THROMBOSIS (developed a blood clot in his heart caused by the Moderna Covid vaccine) (seriousness criterion medically significant). At the time of the report, CARDIAC VENTRICULAR THROMBOSIS (developed a blood clot in his heart caused by the Moderna Covid vaccine) had not resolved. The action taken with SPIKEVAX NOS (SPIKEVAX NOS) (Intramuscular use) was unknown. No concomitant medication was reported. It was reported that patient had developed a blood clot in his heart caused by the Moderna Covid vaccine. He was currently seeing a heart specialist. It was unknown if the patient experienced any additional symptoms/events. No treatment information was reported.; Reporter's Comments: The benefit -risk relationship of product is not affected by this report.