heart rate really really high; Slide headache ¨; ¨Shortness of breath¨; This spontaneous case was reported by a consumer and describes the occurrence of DYSPNOEA (¨Shortness of breath¨) and HEART RATE INCREASED (heart rate really really high) in a 26-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Polycystic ovarian syndrome and Hashimoto's thyroiditis. Concomitant products included METOPROLOL for Heart rate increased, IRON for an unknown indication.   On 04-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 22-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 22-Apr-2021, the patient experienced DYSPNOEA (¨Shortness of breath¨) (seriousness criterion disability) and HEADACHE (Slide headache ¨). On an unknown date, the patient experienced HEART RATE INCREASED (heart rate really really high) (seriousness criterion disability). The patient was treated with METOPROLOL at an unspecified dose and frequency. At the time of the report, DYSPNOEA (¨Shortness of breath¨), HEART RATE INCREASED (heart rate really really high) and HEADACHE (Slide headache ¨) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Electrocardiogram: Normal. On an unknown date, Fibrin D dimer: Negative. On an unknown date, Heart rate increased: 170/160 High. On an unknown date, Troponin: (Negative) OTHER.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Concomitant medications includes: birth control pills  Patients hart rate is staying very very high at all times of the day, if patient goes from the sofa and enter in the kitchen, it  jumps to 125,If go walking in the park, the  heart rate would go from 125 to 150.  The second dose was given around 1 pm afternoon and the symptoms started around 8 pm that same day. The caller had slide headache  and the heart rate was really rally high.  The caller said that not only for the hard heart beat, but mostly the shortness of breath has change her entire life, she is taking a year off school because of this symptoms,  she has stopped going to the gym, because she gets short of breath so she is looking for answers, to feel better again.  Treatment includes Metoprolol 25mg , 1 tablet right after the 2nd dose symptoms started, and after that, patient started with a regular treatment with 3 tablets of Metoprolol per day.  Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested   This case was linked to MOD-2021-042595 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 11-Jun-2021: Upon internal review on 08-DEC-2022 non-significant correction was performed to update "case received from field" to blank; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded. Further information has been requested