Received Jul 7, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| COVID19 | COVID19 (COVID19 (MODERNA)) | MODERNA | UNK | — | IM |
Heart rate is very low; This spontaneous case was reported by a consumer and describes the occurrence of HEART RATE DECREASED (Heart rate is very low) in a 71-year-old female patient who received mRNA-1273.712 (SPIKEVAX 2024-2025 PFS) for COVID-19 prophylaxis. Previously administered products included for COVID-19 prophylaxis: Spikevax NOS in 2024. Past adverse reactions to the above products included No adverse effect with Spikevax NOS. Family history included Heart failure (Mother died from heart failure) and Heart rate low (genetic propensity for a slow heart rate) since an unknown date. In June 2025, the patient received dose of mRNA-1273.712 (SPIKEVAX 2024-2025 PFS) (Intramuscular use) 1 dosage form. In June 2025, the patient experienced HEART RATE DECREASED (Heart rate is very low). At the time of the report, HEART RATE DECREASED (Heart rate is very low) had not resolved. DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In June 2025, Heart rate: Heart rate was very low. Concomitant medication use information was not provided by reporter. In September 2025, the patient's age would be 72. The patient received Spikevax two weeks ago in June 2025 and last year in 2024. All previous doses of COVID-19 vaccine were Moderna. It was reported that there was a genetic propensity for a slow heart rate. That's all, it was not related to COVID. It was unknown if the patient experienced any additional symptoms/events. Treatment medication use information was not provided by reporter. This case was linked to US-MODERNATX, INC.-MOD-2025-787905 (E2B Linked Report).; Sender's Comments: US-MODERNATX, INC.-MOD-2025-787905:Patient 2 (Brother's case)
Heart rate low (genetic propensity for a slow heart rate)
Medical History/Concurrent Conditions: Heart failure (Mother died from heart failure)
Test Date: 202506; Test Name: Heart rate; Result Unstructured Data: Heart rate was very low