arrhythmia; continuous tachycardia independent of the type of activity; palpitations; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp) from the ra-web. regulatory number: it-minisal02-844019. a 56 year-old female patient received bnt162b2 (comirnaty), intramuscular, administration date 17jan2022 (lot number: fp8191) as dose 1, single for covid-19 immunisation. the patient's relevant medical history and concomitant medications were not reported. the following information was reported: arrhythmia (medically significant) with onset 19jan2022, outcome "unknown", described as "arrhythmia"; tachycardia (non-serious) with onset 19jan2022, outcome "unknown", described as "continuous tachycardia independent of the type of activity"; palpitations (non-serious) with onset 19jan2022, outcome "unknown", described as "palpitations". clinical course: impact on quality of life (8/10) no follow-up attempts are possible. no further information is expected