From the article / study linked above👆

“Within 48 hours, researchers detected spike proteins in both cell cultures and noticed abnormalities in heart contractions.

The researchers recorded heart contractions in a supplementary video, comparing normal contractions in an unvaccinated rat heart cell (1A) with vaccinated cells.

Pfizer-vaccinated cells displayed stronger, sustained contractions (1B) due to increased protein kinase A (PKA) activity.

The authors concluded that at the cellular level, the effects of the COVID-19 vaccines seemed to align closer with cardiomyopathy than with myocarditis. Cardiomyopathy is a condition where heart muscles become both structurally and functionally abnormal in the absence of other heart diseases. This differs from myocarditis and pericarditis, which occur when heart muscles become inflamed and damaged.”

https://x.com/thechiefnerd/status/1716427765975482753

@ChiefNerd