This spontaneous case was reported by a consumer and describes the occurrence of CARDIAC DISORDER (Diagnosis with heart issue), CHEST PAIN (Chest pain/ severe chest pain, patient thought might be having heart attack), PAIN (Experiencing the pain/ extreme pain), PAIN IN EXTREMITY (Sore arm) and MUSCULOSKELETAL PAIN (Shoulder blade pain was excruciating pain) in a 74-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below. Concurrent medical conditions included Hypothyroidism and Allergy to antibiotic (Mostly antibiotics). Concomitant products included LEVOTHYROXINE SODIUM (SYNTHROID) for Hypothyroidism. On 30-Aug-2021, the patient received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. In 2021, the patient experienced CARDIAC DISORDER (Diagnosis with heart issue) and CHEST PAIN (Chest pain/ severe chest pain, patient thought might be having heart attack). On 31-Aug-2021, the patient experienced PAIN IN EXTREMITY (Sore arm). On 01-Sep-2021, the patient experienced MUSCULOSKELETAL PAIN (Shoulder blade pain was excruciating pain) and PALPITATIONS (Heart palpitations/ heart palpitation became increasing worst). On an unknown date, the patient experienced PAIN (Experiencing the pain/ extreme pain). On unknown date, the patient experienced INFLAMMATION (Reoccurring inflammation). The patient was treated with IBUPROFEN (ADVIL [IBUPROFEN]) at an unspecified dose and frequency; NAPROXEN SODIUM (ALEVE) at an unspecified dose and frequency; DIPHENHYDRAMINE CITRATE, IBUPROFEN (MOTRIN PM) at an unspecified dose and frequency and ASPIRIN [ACETYLSALICYLIC ACID] at an unspecified dose and frequency. At the time of the report, CARDIAC DISORDER (Diagnosis with heart issue), CHEST PAIN (Chest pain/ severe chest pain, patient thought might be having heart attack), PAIN (Experiencing the pain/ extreme pain), PAIN IN EXTREMITY (Sore arm), MUSCULOSKELETAL PAIN (Shoulder blade pain was excruciating pain), PALPITATIONS (Heart palpitations/ heart palpitation became increasing worst) and INFLAMMATION (Reoccurring inflammation) had not resolved. DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In 2021, Blood pressure measurement: blood pressure was increasing (High) Blood pressure was increasing. In 2021, Electrocardiogram: abnormal (abnormal) abnormal and abnormal (abnormal) abnormal. Patient stated that they saw internist who put a monitor and noticed the patient's blood pressure was increasing. Patient was recommended to see Cardiologist. Patient stated that later diagnosed with heart issue couple of months later. Patient had chest pain and on 19 Nov 2021 had sever chest pain, patient thought might be having heart attack. Patient stated their symptoms were resolved by December. Patient stated that they took so many medicine but none of the help relief the pain. Patient still experiencing the pain and having reoccurring inflammation. Patient stated that they experienced the extreme pain two days ago. Patient also stated that they have been informed by their doctor on not to take the booster vaccine. The symptoms had worsened and was reoccurring.