heart palpitations; Her heart palpitations progressively got a little worse after having them for a while after that second dose; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 72-year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 08Mar2021 (Lot number: EL9266) at the age of 72 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Verbatim: high blood pressure" (ongoing), notes: diagnosed years ago, lost 100 pounds and went on low dose for a while, it came back about 3 years ago; "covid-19", start date: Feb2020 (unspecified if ongoing), notes: She thinks she had covid in Feb2020; "lost 100 pounds" (unspecified if ongoing), notes: then lost 100 pounds. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (1st dose, Lot: EL9265), administration date: 08Feb2021, when the patient was 72 years old, for COVID-19 Immunization. The following information was reported: PALPITATIONS (non-serious) with onset Apr2021, outcome "recovered" (2021), described as "heart palpitations"; CONDITION AGGRAVATED (non-serious) with onset Apr2021, outcome "recovered" (2021), described as "Her heart palpitations progressively got a little worse after having them for a while after that second dose". The events "heart palpitations" and "her heart palpitations progressively got a little worse after having them for a while after that second dose" were evaluated at the physician office visit and emergency room visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of palpitations, condition aggravated.  Additional information: After her second Pfizer covid vaccine, about three weeks later she had heart palpitations, she went to ER after never having them before in her life. She had tests done and she wore a heart monitor for 30 days. She saw a cardiologist and was told it was benign. Her heart palpitations progressively got a little worse after having them for a while after that second dose and then she went to ER on a Sunday. She was not admitted. About 4 to 6 weeks later it was gone. She is scared to death about taking the booster. She is thinking about getting the Moderna booster instead. She will probably have her antibodies checked. Clarifies that her heart palpitations started in Apr2021 and were gone by May or beginning of Jun2021. She had several visits to the cardiologist. She was given a medication called propafenone hcl 150mg that was supposed to help regulate the heart palpitations, but it didn't do anything for it. She thinks she had covid in Feb2020. The first two weeks of Feb2020 she thought she had the flu and did not have pneumonia according to the chest x-ray. Tested negative for the flu. She was sent home with antibiotics and steroids and neither one of those seemed to help. She would wake up in the middle of the night thinking she could not get her next breath. Her lungs did not wheeze they crackled. She no longer has the steroids or antibiotic to provide lot, ndc, or expiration date. She lost her sense of taste and smell and lost 8 pounds. She made herself get up and walk. Reports they picked up something in her lower right lung when doing a CT for something else, thought it was a nodule and it disappeared. They were following it for 9 months and then it disappeared. Reports she had low oxygen levels ever since she covid last year, she was always told to breathe since her oxygen was low in the 80s but at her last doctors visit it was normal. When she thought she had covid, her blood pressure was up and her blood pressure medication had to be doubles and it is not because she lost weight, she does not know why that occurred. Additional vaccines administered on same date of the Pfizer suspect reported as none. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine.  No follow-up attempts are possible. No further information is expected.