Scientists measured myocardial 18Fluorine-fluorodeoxyglucose (18F-FDG) uptake. F-FDG has molecular similarity to glucose. However, 18F-FDG does not metabolize like glucose. Therefore, PET scans could detect it, and its presence shows the heart muscle's abnormally high demand for glucose, indicative of abnormal cardiac function. More about it here.

Conclusions: Focal myocardial 18F-FDG uptake seen on oncologic PET/CT indicates a significantly increased risk for multiple myocardial abnormalities.

Indeed, this is what the Nakahara study finds:

Results

The study included 303 nonvaccinated patients (mean age, 52.9 years; 157 females) and 700 vaccinated patients (mean age, 56.8 years; 344 females). Vaccinated patients had overall higher myocardial FDG uptake compared to nonvaccinated patients (median SUVmax, 4.8 vs median SUVmax, 3.3 ; P < .0001). Myocardial SUVmax was higher in vaccinated patients regardless of sex (median range, 4.7-4.9 ) or patient age (median range, 4.7-5.6) compared to corresponding nonvaccinated groups (sex median range, 3.2-3.9; age median range, 3.3-3.3; P range, <.001-.015). Furthermore, increased myocardial FDG uptake was observed in patients imaged 1-30, 31-60, 61-120, and 121-180 days after their second vaccination (median SUVmax range, 4.6-5.1) and increased ipsilateral axillary uptake was observed in patients imaged 1-30, 31-60, 61-120 days after their 2nd vaccination (median SUVmax range, 1.5-2.0) compared to the nonvaccinated patients (P range, <.001-<.001).

This was not supposed to happen! The COVID vaccine is not supposed to affect the heart in any way. It was promised to "stay in the arm."

The explosive findings of the study are discussed in the editorial that the editor of the magazine, Dr. Bluemke, felt obliged to publish.