irregular heart beat; tachycardia; the soreness is more in the joint now than in the muscle. She said that she notified them when she got the second shot.; the soreness is more in the joint now than in the muscle. She said that she notified them when she got the second shot.; This is a spontaneous report from a contactable consumer or other non-healthcare professional.   A 71-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for Injection), dose 2 via intramuscular, administered in Deltoid Left on 01Mar2021 (age at vaccination: 70 years) (Batch/Lot Number: EM6198) as DOSE 2, SINGLE for covid-19 immunisation. Medical history included: ongoing High cholesterol, hypothyroidism, and blood pressure. Concomitant medications included exemestane from Jun2020 at 25mg once a day taken for breast cancer, Exemestane Aromatase inhibitor for breast cancer. Changed to this product from another aromatase inhibitor; levothyroxine sodium (SYNTHROID) (125mcg 5 times a week. 100mcg 2 times a week (Tuesday and Saturday) Once a day by mouth) taken via oral for hypothyroidism, thinks she started it around 1999; hctz (25mg once a day by mouth) taken for blood pressure, started it in about 1988 and lisinopril (40mg once a day by mouth) taken for blood pressure, probably been on it since around 1993. Historical vaccine included BNT162B2 on 06Feb2021 (age at vaccination: 70 years) for Covid-19 immunisation and experienced some soreness in her arm. On an unspecified date, the patient experienced the soreness is more in the joint now than in the muscle. She said that she notified them when she got the second shot, irregular heartbeat and tachycardia. The patient called about the Covid-19 and said that she had the first vaccine on 06Feb2021, and she was in her usual state of health aside from some soreness in her arm. On 26Feb2021, she developed tachycardia and had uneven beats in her heart. She went to the doctor on Monday, 01Mar2021, and was supposed to have the second dose later that day. She said that she did not want to have the second dose until she knew what was going on with her heart. She said that the EKG showed irregular heartbeats. She said that the doctor ordered a halter monitor and blood tests. The halter monitor was worn from the 03Mar2021 to 05Mar2021. She said that all of this continued where her pulse was all over the place. The night of the 07Mar2021 it got so bad she ended up in the emergency room. They said it was not life threatening and the irregular heartbeat and tachycardia continued. She said that the halter monitor confirmed she had problems. She saw an electrophysiologist on 12Mar2021 and she recommended that she take a beta blocker. She said that she has not started the beta blocker yet because she has not received it in the mail yet. She had the second dose of the Covid-19 Vaccine on 01Mar2021. She said that the tachycardia ended on the 13Mar2021. She occasionally has a skipped beat, but it is no longer like it was when her pulse was all over the place. Reporter said that she is considering not taking the beta blocker. Reporter said that this was all rather bizarre, and everyone said that it happened too long after she received the vaccination for it to be related. The reporter said that she has never had anything like this happen before though. Reporter wanted to know if these side effects have been reported before. She said that it is not just herself. She can also tell a story of her husband's heart as well. Reporter confirmed it was after he received the Covid-19 vaccine. Reporter has no physician email address to provide. Soreness in her arm She said that the soreness is more in the joint now than in the muscle. She said that she notified them when she got the second shot. Uneven Heartbeat Said that it has gone away but occasionally her heart still skips a beat. She said that her heart has skipped a beat previously and she went to doctors probably twice over the course of 25 years. It would happen sometimes where her heart would skip a beat. Laboratory tests on an unknown date included dimmer tests with unknown results (had troponins, dopplers, and dimmer tests for pulmonary emboli done), electrocardiogram: showed irregular heartbeats, metabolic function test: unknown results (Metabolic panels too), troponin: unknown results (had troponins, dopplers, and dimmer tests for pulmonary emboli done) and ultrasound doppler: unknown results (had troponins, dopplers, and dimmer tests for pulmonary emboli done). The patient did not take the treatment for the events. The outcome of the events irregular heartbeat and the soreness is more in the joint now than in the muscle. She said that she notified them when she got the second shot was recovering and tachycardia was recovered on 13Mar2021.  No follow-up attempts are possible. No further information is expected.