it's caused her to have an SVT (super-ventricular tachycardia) now; heart was palpitating; blood pressure was way too high; terrible headache, She felt like her head was going to explode; This spontaneous case was reported by a consumer and describes the occurrence of SUPRAVENTRICULAR TACHYCARDIA (it's caused her to have an SVT (super-ventricular tachycardia) now), PALPITATIONS (heart was palpitating), HYPERTENSION (blood pressure was way too high) and HEADACHE (terrible headache, She felt like her head was going to explode) in a 41-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 043L20A and 025L20A) for COVID-19 vaccination.     Concurrent medical conditions included Asthma and Allergy NOS.   On 30-Dec-2020, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 27-Jan-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 27-Jan-2021, the patient experienced PALPITATIONS (heart was palpitating) (seriousness criterion hospitalization), HYPERTENSION (blood pressure was way too high) (seriousness criterion hospitalization) and HEADACHE (terrible headache, She felt like her head was going to explode) (seriousness criterion hospitalization). On an unknown date, the patient experienced SUPRAVENTRICULAR TACHYCARDIA (it's caused her to have an SVT (super-ventricular tachycardia) now) (seriousness criterion hospitalization). The patient was hospitalized on 27-Jan-2021 due to HEADACHE, HYPERTENSION and PALPITATIONS. The patient was treated with METOPROLOL on 27-Jan-2021 for Blood pressure high, at a dose of 25 mg. At the time of the report, SUPRAVENTRICULAR TACHYCARDIA (it's caused her to have an SVT (super-ventricular tachycardia) now), PALPITATIONS (heart was palpitating), HYPERTENSION (blood pressure was way too high) and HEADACHE (terrible headache, She felt like her head was going to explode) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In January 2021, Electrocardiogram: abnormal (abnormal) irregular EKG every time. On 27-Jan-2021, Blood pressure measurement: high (High) blood pressure was way too high. On 27-Jan-2021, Heart rate: 198 (abnormal) pulse was like 198. On 27-Jan-2021, Troponin increased: high (High) troponin level was elevated. In 2021, Cardiac stress test: normal (normal) normal. On 23-Aug-2021, Electrocardiogram: abnormal (abnormal) had an irregular EKG every time since she went to the cardiologist..         The patient went to the urgent care on 27Jan2021  where she spent four days.She took the beta blocker for the 5 days, 4 nights when she was in the hospital and she came home.  She took it for two days, then her blood pressure bottomed out and was hospitalized on unknown date where she spent another 3 nights and 4 days.  She was supposed to see an electrophysiologist, who told her they want to do an ablation, on 16Sep2021. But she didn't. because it was too costly for her. She stated that she only took metoprolol only when her blood pressure went high. In addition to the beta blocker, the patient was told to do breathing episodes and some maneuver where had to try a bowel movement. They told her to splash ice cold water on her face. The patient confirmed that she never had symptoms like these before receiving the Moderna COVID19 Vaccine. Concomitant product use was not provided by reporter.  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-2021-313332 (Patient Link).; 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.