pulse got up to 105 for just a few seconds; heart palpitations; fatigue heart ("heart felt tired" per Caller).; Felt like she needed to rest her heart; A Little Arm Soreness; This is a spontaneous report from a contactable consumer (patient) reported for herself. A 66-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot Number: EN6198, Expiry date, NDC number: unknown), via an unspecified route of administration administered in left arm on 03Mar2021 (age at vaccination was 66 years) as dose 1, single for COVID-19 immunisation. Medical history included ongoing Benign PVCs from an unknown date. No concomitant medication reported. Historical vaccine includes flu shot on an unspecified date and she got a sore arm. Family medical history and prior vaccinations were reported as none. The patient states on 03Mar2021, she had her first Covid vaccine. The reason patient thought about this, was because she read an article by the CDC yesterday about myocarditis in relation to the vaccine and patient had some of the symptoms. The patient states after the got the vaccine on Wednesday, patient was fine on wed (03Mar2021), other than a little arm soreness that continued to Thursday, but patient was fine. The patient states on Friday (05Mar2021), patient got up and ran errands and patient felt fine, but then after lunch, patient got heart palpitations. The patient had them in the past but not a whole lot and they were mild and patient could go about what patient was doing and then they went away. The patient states she didn't feel sick or tired but patient felt like needed to rest her heart. On Saturday (06Mar2021), they were worse and lasted all day. The patient states on Sunday (07Mar2021), patient got up and got dressed because patient thought if patient had to go to the ER, patient didn't want to go in her pajamas. The patient states then they eased up and on Sunday (07Mar2021), they got a little bit eased up. On Monday (08Mar2021), the patient called her Cardiologist. The patient doesn't really have heart problems, just benign PVCs, but they didn't know anything about reactions to the vaccine so patient called her PCP, and she said yes, that can be a side effect and it is not uncommon and manifests on days 3-7 which was exactly the time frame she had them. The patient had them from Friday (05Mar2021) afternoon until Monday (08Mar2021) and patient just had to rest and patient watched a lot of movies. The patient states by, Wednesday (10Mar2021), so exactly a week after, they eased up but it took her a while to get back to feeling back to normal. The patient energy level didn't get back to normal 100% until a month later. Cardiologist moved so she needed to establish with a new cardiologist and at her initial consult with him, on an unspecified date they did an EKG there in the exam room, a basic one, but more extensive than ever before in the exam room and said everything looks fine and they are not concerned, and everything seemed fine with her heart. The palpitations started on 05Mar2021, patient started feeling noticeably better by 9Mar2021, she only had a few palpitations but not as many. On 10Mar2021, patient felt like going out and she ran a bunch of errands Wednesday morning and patient felt fine and got home at noon. On 10Mar2021, the patient pulse got up to 105 for just a few seconds when she got home. The patient was not sure if that was common, she was not used to checking her pulse. The patient rested with the first one and has supplements there and patient took antioxidants, Vitamins A, C, Zinc, Vitamin D, and patient takes Vitamin D nearly every day. The patient probably took Beta Carotene and Vitamin E. The patient ate really healthy, fruits and veggies, lean meats. The patient was on no medication, has great blood pressure, and her check ups are good, she actually has kind of the lower blood pressure 112/89 on an unspecified date. The patient not visited emergency room and physician office. Outcome of the event a little arm soreness was resolved on 04Mar2021 and remaining events were resolved on 10Mar2021.