I had 3 Moderna shots and never had any problem, the Booster shot that they gave me, SVT my heart rate  went 230 beats a minute; Now I got a new virus yesterday since I got it; This spontaneous case was reported by a patient and describes the occurrence of SUPRAVENTRICULAR TACHYCARDIA (I had 3 Moderna shots and never had any problem, the Booster shot that they gave me, SVT my heart rate  went 230 beats a minute) and VIRAL INFECTION (Now I got a new virus yesterday since I got it) in a  patient of an unknown age and gender who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     No Medical History information was reported.   On an unknown date, the patient received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form, second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form and first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced SUPRAVENTRICULAR TACHYCARDIA (I had 3 Moderna shots and never had any problem, the Booster shot that they gave me, SVT my heart rate  went 230 beats a minute) and VIRAL INFECTION (Now I got a new virus yesterday since I got it). At the time of the report, SUPRAVENTRICULAR TACHYCARDIA (I had 3 Moderna shots and never had any problem, the Booster shot that they gave me, SVT my heart rate  went 230 beats a minute) and VIRAL INFECTION (Now I got a new virus yesterday since I got it) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Heart rate: 77 (normal) 77 and 230 (High) 230 beats a minute.         Concomitant medications were not reported.  The patient reported had three doses of Moderna and never had any problem,and after receiving the Booster dose, patient had supraventricular tachycardia (SVT), heart rate  went 230 beats a minute and also had got a new virus since patient had got booster shot.   Treatment information was not reported.  Company Comment: This spontaneous case reported by consumer concerns a patient of unknown age and gender, with no reported medical history, who experienced unexpected non-serious AESI supraventricular tachycardia after receiving a dose of mRNA-1273.  The patient reported that he or she had previously received 3 doses of mRNA-1273 without any problems, then after getting an unspecified booster dose developed supraventricular tachycardia with heart rate reaching 230 beats per minute.  Further clinical course, concomitant medications, and treatment details were not reported.  The outcome is unknown.  The benefit risk relationship of mRNA-1273 is not affected by this report.; Sender's Comments: This spontaneous case reported by consumer concerns a patient of unknown age and gender, with no reported medical history, who experienced unexpected non-serious AESI supraventricular tachycardia after receiving a dose of mRNA-1273.  The patient reported that he or she had previously received 3 doses of mRNA-1273 without any problems, then after getting an unspecified booster dose developed supraventricular tachycardia with heart rate reaching 230 beats per minute.  Further clinical course, concomitant medications, and treatment details were not reported.  The outcome is unknown.  The benefit risk relationship of mRNA-1273 is not affected by this report.