Heart attack; Passing out symptoms; Could not walk, had no use of her body; This spontaneous case was reported by a consumer and describes the occurrence of MYOCARDIAL INFARCTION (Heart attack), LOSS OF CONSCIOUSNESS (Passing out symptoms) and GAIT DISTURBANCE (Could not walk, had no use of her body) in an elderly female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     No Medical History information was reported.   On 19-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 19-Feb-2021, 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 experienced MYOCARDIAL INFARCTION (Heart attack) (seriousness criteria hospitalization and medically significant), LOSS OF CONSCIOUSNESS (Passing out symptoms) (seriousness criteria hospitalization and medically significant) and GAIT DISTURBANCE (Could not walk, had no use of her body) (seriousness criterion hospitalization). The patient was hospitalized for 7 days due to GAIT DISTURBANCE and LOSS OF CONSCIOUSNESS. At the time of the report, MYOCARDIAL INFARCTION (Heart attack), LOSS OF CONSCIOUSNESS (Passing out symptoms) and GAIT DISTURBANCE (Could not walk, had no use of her body) outcome was unknown.            Concomitant product use was not provided by the reporter.  Patient stated that they were supposed to be sending her information about compensation for her hospitalizations that she had after receiving 2 doses (2nd dose lot number unknown because she cannot find her vaccination card on 19 Feb 2021) of the Moderna Covid-19 Vaccine. She claimed that she called at the end of 2021 but has never received any paperwork from us. She did not have a case reference number. About 2 or 3 weeks after her second injection she had passing out symptoms, could not walk, had no use of her body, and was hospitalized for a week. A week after getting out of the hospital she had a heart attack and had to be hospitalized again.  Treatment information was not provided.  Company comment- This spontaneous case concerns an 85-year-old female, with no reported medical history, who experienced unlisted, serious (hospitalization, medically significant) AESI of Myocardial infarction, unlisted, serious (hospitalization, medically significant) event of Loss of consciousness and unlisted, serious (hospitalization) event of Gait disturbance. Patient claimed that about 2 or 3 weeks after her 2nd injection she had passing out symptoms, couldn't walk, had no use of her body, & was hospitalized for a week and then a week after getting out of the hospital she had a heart attack & had to be hospitalized again. No further detail regarding the hospital clinical course, laboratory tests and treatment were given. At the time of reporting, the outcome of the events are unknown. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.; Sender's Comments: This spontaneous case concerns an 85-year-old female, with no reported medical history, who experienced unlisted, serious (hospitalization, medically significant) AESI of Myocardial infarction, unlisted, serious (hospitalization, medically significant) event of Loss of consciousness and unlisted, serious (hospitalization) event of Gait disturbance. Patient claimed that about 2 or 3 weeks after her 2nd injection she had passing out symptoms, couldn't walk, had no use of her body, & was hospitalized for a week and then a week after getting out of the hospital she had a heart attack & had to be hospitalized again. No further detail regarding the hospital clinical course, laboratory tests and treatment were given. At the time of reporting, the outcome of the events are unknown. The benefit-risk relationship of mRNA-1273 vaccine is not affected by this report.