Why did Damar Hamlin's heart stop?!?!?

What is cardiac arrest? Was his collapse caused by the vaccine? Will he be okay??? Should any questions be off limits???
https://youtu.be/mmXbdP2IVzQ
https://amzn.to/3K2452d
https://litfl.com/drugs-causing-qt-prolongation/
https://pubmed.ncbi.nlm.nih.gov/17957272/
https://youtu.be/H-G9mziXL9w
https://www.ahajournals.org/doi/full/10.1161/CIRCEP.111.962712
Sponsor: LocalSilverMint.com