"We continue to see vaccinated persons suffer cardiac arrests three years after most took the shots in 2021. Both Pfizer and Moderna mRNA have been found in human heart muscle at autopsy. Spike protein has been stained in biopsy samples of young men suffering from myocarditis. Victims have been found to have circulating Spike protein but ineffective antibodies, probably IgG4 subclass, that fail to neutralize Spike and allow its assault on the heart. Positron emission tomography data have disclosed a shift from free fatty acid to glucose in the human heart of virtually everyone who has taken a COVID-19 vaccine. The PET pattern looks like global ischemia. This could be due to vaccine Spike protein hemagglutination in myocardial capillaries or cellular changes in mitochondrial respiration and substrate metabolism. Small patches of dysfunctional, inflamed, or scarred myocardium are sufficient to serve as a nidus for re-entrant ventricular tachycardia that can degrade to ventricular fibrillation and lead to cardiac arrest." https://petermcculloughmd.substack.com/p/risk-stratification-for-future-cardiac