something with her heart; reaction; heart pvc kind of stuff; palpitations; did not get the 2nd dose as they are afraid of receiving another dose since the patient believes she should receive a lower dosage as they are very small; This spontaneous case was reported by a consumer and describes the occurrence of CARDIAC DISORDER (something with her heart), VACCINATION COMPLICATION (reaction) and VENTRICULAR EXTRASYSTOLES (heart pvc kind of stuff) in an 86-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.     No Medical History information was reported.    On an unknown date, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, the patient experienced CARDIAC DISORDER (something with her heart) (seriousness criterion medically significant), VACCINATION COMPLICATION (reaction) (seriousness criterion medically significant), VENTRICULAR EXTRASYSTOLES (heart pvc kind of stuff) (seriousness criterion medically significant), PALPITATIONS (palpitations) and PRODUCT DOSE OMISSION ISSUE (did not get the 2nd dose as they are afraid of receiving another dose since the patient believes she should receive a lower dosage as they are very small). At the time of the report, CARDIAC DISORDER (something with her heart), VACCINATION COMPLICATION (reaction), VENTRICULAR EXTRASYSTOLES (heart pvc kind of stuff), PALPITATIONS (palpitations) and PRODUCT DOSE OMISSION ISSUE (did not get the 2nd dose as they are afraid of receiving another dose since the patient believes she should receive a lower dosage as they are very small) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       It was reported that the patient did not get the 2nd dose as "they are afraid of receiving another dose since the patient believes she should receive a lower dosage as they are very small. No concomitant medications information was reported. No treatment medications were provided.  Company Comment:This is a spontaneous case concerning a 86-year-old, female patient with no reported medical history, who experienced the unexpected serious events of Cardiac disorder and Ventricular extrasystoles. The event occurred on an unknown day after the first dose of mRNA-1273 vaccine. Vaccination complication is also reported. Product dose omission issue is also noted in this case as the patient is afraid of receiving another dose and she believes she should receive a lower dosage. No reported treatment. The outcome of the events is unknown. Patients elderly age could be the confounder. The benefit-risk relationship of mRna-1273 is not affected by this report.   Most recent FOLLOW-UP information incorporated above includes: On 15-Dec-2021: Followup contains no new information; Sender's Comments: This is a spontaneous case concerning a 86-year-old, female patient with no reported medical history, who experienced the unexpected serious events of Cardiac disorder and Ventricular extrasystoles. The event occurred on an unknown day after the first dose of mRNA-1273 vaccine. Vaccination complication is also reported. Product dose omission issue is also noted in this case as the patient is afraid of receiving another dose and she believes she should receive a lower dosage. No reported treatment. The outcome of the events is unknown. Patients elderly age could be the confounder. The benefit-risk relationship of mRna-1273 is not affected by this report.