Heart Attack; Panic attack; Couldnt breathe; Felt like chest caved in; Chest pain; Blood clot; Arm Pain; This spontaneous case was reported by a consumer and describes the occurrence of MYOCARDIAL INFARCTION (Heart Attack), PAIN IN EXTREMITY (Arm Pain), PANIC ATTACK (Panic attack), DYSPNOEA (Couldnt breathe), CHEST DISCOMFORT (Felt like chest caved in), CHEST PAIN (Chest pain) and THROMBOSIS (Blood clot) in a 34-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 048B21A) for COVID-19 vaccination.     The patient's past medical history included Flu vaccination (received about 5 weeks ago before he got the Covid Shot and had chest pain) and Sinusitis (the patient stated that he violently threw up and he was sick for 2 weeks; the doctors then said that it may have been a stroke or a heart attack but he definitely had sinusitis.). Concurrent medical conditions included Diabetes, Cholesterol high and Blood pressure high.    On 13-May-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 13-May-2021, the patient experienced PAIN IN EXTREMITY (Arm Pain) (seriousness criterion hospitalization). On 15-May-2021, the patient experienced PANIC ATTACK (Panic attack) (seriousness criterion hospitalization), DYSPNOEA (Couldnt breathe) (seriousness criterion hospitalization), CHEST DISCOMFORT (Felt like chest caved in) (seriousness criterion hospitalization), CHEST PAIN (Chest pain) (seriousness criterion hospitalization) and THROMBOSIS (Blood clot) (seriousness criteria hospitalization and medically significant). On 15-May-2021 at 4:00 PM, the patient experienced MYOCARDIAL INFARCTION (Heart Attack) (seriousness criteria hospitalization and medically significant). The patient was hospitalized for 3 days due to CHEST DISCOMFORT, CHEST PAIN, DYSPNOEA, MYOCARDIAL INFARCTION, PAIN IN EXTREMITY, PANIC ATTACK and THROMBOSIS. The patient was treated with ACETYLSALICYLIC ACID (BABY ASPIRIN) ongoing since an unknown date at an unspecified dose and frequency; LISINOPRIL ongoing since an unknown date at a dose of 5 mg; METOPROLOL SUCCINATE ongoing since an unknown date at a dose of 50 mg; NITROGLYCERIN ongoing since an unknown date at a dose of 10 mg as required; PRASUGREL ongoing since an unknown date at a dose of 10 milligram; SPIRONOLACTONE ongoing since an unknown date at a dose of 25 mg and ROSUVASTATIN ongoing since an unknown date at a dose of 80 milligram. At the time of the report, MYOCARDIAL INFARCTION (Heart Attack), PAIN IN EXTREMITY (Arm Pain), PANIC ATTACK (Panic attack), DYSPNOEA (Couldnt breathe), CHEST DISCOMFORT (Felt like chest caved in), CHEST PAIN (Chest pain) and THROMBOSIS (Blood clot) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       Concomitant medications were not reported.  The patient reported that he had a heart attack on 15 May 2021, after football practice Patient was in the hospital for 3 days. Treatment also included catheter placement and then a stint in heart.  Company Comment : Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.