felt flushed; muscle pains around the chest area; He is having palpitations; 160-190 pulse rate; fast irregular heart rate; chest tightness; myocarditis/muscle pains around the chest area and heart like others complain about.; Supraventricular tachycardia; This is a spontaneous report from a contactable consumer (patient) via a Pfizer-sponsored program. A 34-year-old male patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 1 via an unspecified route of administration, administered in Arm Right on 10Jun2021 (Batch/Lot Number: EW0185) as dose 1, single; and dose 2 via an unspecified route of administration, administered in Arm Right on 08Jul2021 13:00 (Batch/Lot Number: FA6780) as dose 2, single for Covid-19 immunization. The patient was 34-year-old at the time of vaccination. There were no medical history and concomitant medications. The patient reported receiving both doses of Pfizer Covid vaccine second dose on 08Jul2021 and within 15 minutes began having chest tightness. The patient reported getting up in the morning going to brush his teeth at the sink and started have the same chest tightness, checked his pulse with finger pulse oximeter and it read 160-190 pulse rate. The patient stated that he was having palpitations, fast irregular heartbeats since receiving the Pfizer Covid vaccine. He saw his Cardiologist today and was now wearing a cardiac monitor for a few weeks. He also reported that he saw the electrocardiologist last week as well. He stated that he has future appointment next week for Echo and nuclear stress test. He added that he exercises all the time and has never had any problems with his heart, heart has always been healthy before the vaccine. He further stated that he sees a Cardiologist every year just make sure he is healthy. He stated "he is scared", he just wanted there to be something to counter what is going on with his heart, that there is something he could take to tell his immune system to stop attacking his own heart cells. The patient again reported he was very scared and explained he got Pfizer Covid vaccine 2 months ago and after both doses he has had a tight chest. A week and half ago he experienced what the agent says is ZTP, a very fast irregular heart rate. He is currently wearing a heart monitor and is very scared about the fast heart rate as he never had this issue before. The patient wanted to know if there are any medications or treatments for this condition. He noted that he doesn't take any medication or have any medical conditions, he is a very health guy. He has never had heart problems which is why this came as a surprise and why he is freaking out. He didn't have to go to the ER but thought he was going to have to go. He had an episode of what was clarified as supraventricular tachycardia, this was per his doctor and after 10 -15 minutes it stabilized. He had called his doctor and was given instructions on when to go to the ER. He added that after the first and second dose, he had no flu like symptoms like his family members or relatives did so he felt lucky. For him he had chest tighten within 15-20 minutes after getting both shots. After a while it started going away and he thought it was the muscle pains around the chest area and heart like others complain about. Then, 2 Saturdays ago, so about a week and a half ago, he woke up, urinated, brush his teeth and when he stood up straight, he felt flushed and didn't know what that was but his heart was beating quick. He used his pulse oximetry and his heart was 160 -190. This was confirmed to be the first episode of this event. He is currently wearing a heart monitor so they can keep an eye on it for the next 10 days to see if it happens again. He thinks myocarditis is what he has, heart inflammation. The outcome of events was unknown.  Follow-up attempts are completed. No further information is expected.