Covid Vaccines Linked to Heart Muscle Changes: Study
A recent study by Nakahara et al. has revealed changes in heart muscle function among Covid-vaccinated patients, using positron emission tomography (PET) scans. The research, published in JAMA Cardiology, found higher myocardial fluorine-fluorodeoxyglucose (F-FDG) uptake in vaccinated patients compared to non-vaccinated ones. The study, using F-FDG PET scans, showed that vaccinated patients had a median SUVmax of 4.8, significantly higher than the 3.3 observed in non-vaccinated patients (P < .0001). This increase was observed regardless of sex or age. While there was a pattern of greater response due to the Moderna vaccine compared to Pfizer, it was not statistically significant. Increased myocardial FDG uptake was also observed in the ipsilateral axillary region, with uptake occurring between 1 to 60 days after the second vaccination. Dr. Bluemke's editorial in the same journal suggests that mild asymptomatic myocardial inflammation could be more common than expected in vaccinated patients. The findings were robust, with a P value of less than .0001. However, the study found no evidence of complete recovery within 180 days. The study by Nakahara et al. provides evidence of changes in heart muscle function among Covid-vaccinated patients. While the implications of these findings are not yet fully understood, they highlight the importance of further research into the long-term effects of Covid-19 vaccines on cardiac health.
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