Dr McCullough is a well respected cardiologist from Dallas. He and I did not work at the same hospital there but I knew of his expertise when I worked at Dallas Methodist as a heart surgeon.
Clearly the spike protein which is quite damaging to vascular endothelium - is stimulated by the vaccine. In addition there appears to be a profound inflammation that involves the heart myocardium as well. Whether from oxygen deprivation from occluded coronary arteries or direct inflammation- the muscle can either develop cardiac arrhythmia and lead to sudden death or become badly functional and cause cardiac failure.
Here is a recent link from Dr McCullough’s substack.
You might like EIM
https://geoffpain.substack.com/p/pfizer-process-2-endotoxin-myocarditis
The infection can cause the same if allowed to continue, not to mention the SV-40 Virus in the polio vaccine, and maybe the mRNAs?......we have been lied to and played as guinea pigs for sooo long.
1) https://newswithviews.com/vaccines-sv40-and-the-cancer-epidemic/
2) https://open.substack.com/pub/anandamide/p/sv40-discussion-with-dr-peter-mccullough
3) https://www.2ndsmartestguyintheworld.com/p/breaking-horrific-update-hiv-infected