afib; her heart beat was irregular and not beating properly; cognitive issues; patient did complain of chest pains; mild stroke.; This is a spontaneous report from a contactable consumer (patient's son). A 94-year-old female patient (reporter's mother) received the second dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Lot number: ER8732) via unspecified route on 01Apr2021 at 13:00 (at the age of 94-years-old) in the right arm as a single dose for COVID-19 immunization. No other vaccines given that same day and no problems with vaccines in past. Medical history included uses walker and just complains of normal common senior stuff since she is now 95. Always was able to do things like go to his daughter's house to play with the grandbabies, it's not the same. There was no relevant family medical history. Concomitant medications were not reported. The patient previously received the first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Lot number: EN6206) via unspecified route on 11Mar2021 in the right arm as a single dose for COVID-19 immunization and experienced problems walking/after the first dose, about 5 days afterwards the legs and walking issues, right foot was not responding properly and turning in a little bit, and problems with her feet moving along. Patient got the vaccine because she was concerned she might get them sick or she could get sick and they were coming in on an airplane. They live on the beach. They have a bunch of visitors and were trying to minimalize potential of getting COVID and fear of the problems. Consumer reported that is mom, who is currently 95 years old received both doses of the Pfizer-BioNTech Covid-19 vaccine and a week after she started taking it she started to get problems walking (Mar2021), was having cognitive issues pretty much since getting the shots (onset reported as Apr2021), she has been losing control of the muscle of her legs (Mar2021) and it is frightening to see this process. He stated it was upsetting because he had to help her walk. These adverse events required a visit to the emergency room (seen at hospital) and physician office. He reported that these events have worsened. The cognitive issues started after the second vaccine. A little recently (2021), patient did complain of chest pains and had to see provider. She was not really doing well and was laying there thinking she was dying. She went to the hospital and they said her heart beat was irregular and not beating properly. They were going to shock her, he believes she was in afib, and was put on the operating table and it miraculously stopped. Twelve hours later they sent her home and when she got home she suffered a mild stroke. Before sending her home, they had her on the operating table because they thought there was a blockage and it appeared to be one on the screen and they got her in there to treat the blockage from what the film showed and they got in there and there was no blockage. They were going to put a stent in and doctor had her on the operating table, but there was no blockage to be found. The outcome of afib was recovered on unspecified date, of cognitive issues was not recovered, while of the other events was unknown.; Sender's Comments: Linked Report(s) : PFIZER INC-202101135295 Same patient/Vaccine, different event, different vaccine dose