Thread by @anish_koka

Its possible for the following 2 things to be true :

1. Vaccines appear to be safe for most people, and appear to be effective in reducing the burden of severe disease

2. mRNA vaccines are associated with myocarditis (the CDC agrees : tinyurl.com/kfj9kc9y)

Much of the debate from mostly non-cardiologists focuses on "mildness" of vaxx-myocarditis, and risk of myocarditis from Sars-COV2 (COVID).
Some thoughts :
1st - multiple datasets beyond the much maligned VAERS report links vaccines with
myocarditis

Israeli Study: Notice uptick after 2nd shot.
"Most cases were mild or moderate in severity, but one patient had cardiogenic shock, and one patient with preexisting cardiac disease died of an unknown cause soon after hospital discharge."
tinyurl.com/hd3nrbun

Military study: (where vaccine mandates are in effect)
Baseline rates of myocarditis are difficult to precisely ascertain, but authors of this paper were very liberal, and even then observed cases >> expected after 2nd dose.

tinyurl.com/3xwvswhf

Vaccine related myocarditis is associated with a significant leak of cardiac enzymes from the heart (as presented to the vaccine advisory committee - VRBPAC).

tinyurl.com/2p8hk43x

Btw, look at how small enzyme leak is with potentially SarsCOV2 caused MIS-C

Vaccine myocarditis is associated with a reduction in function of the heart that appears to rapidly normalize, but MRI findings of patients suggest the formation of scar after vaccine myocarditis are similar to findings in non-vaccine myocarditis.
tinyurl.com/yckjbs34

Limited long term follow up at present, but early evidence suggests about one-third of patients with vaccine myocarditis have evidence of scar/fibrosis in 3 month follow up.

We do not know the long term significance of this.

Generally the presence of scar in the heart (LGE on a cardiac MRI) is a powerful prognosticator of adverse outcome in myocarditis and clinically suspected myocarditis, irrespective of LVEF.

pubmed.ncbi.nlm.nih.gov/32040731/

Importantly, the literature on prognosis to date is from the experience of classic myocarditis, scar post conventional heart attacks which are both more severe clinically. We can be hopeful that vaxx myocarditis has a more benign prognosis, but cannot say for sure right now.

It has been suggested that the risk of myocarditis from Sars-COV2 is higher than the risk of myocarditis from the mRNA vaxx, but this is not certain. The real world experience doesn't fit this (cardiology clinics hv not been flooded) &..

The CDC estimate of Sars-COV2 myocarditis is almost definitely off by many orders of magnitude because they got the denominator wrong in their CDC report.. See thread:

https://twitter.com/anish_koka/status/1449840589978181636?s=20

For the TL/DR folks .. when u r rigorous with how myocarditis is defined (require imaging/lab criteria, not just a billing code) u get this graph which fits w/ reality.. No uptick in myocarditis cases in cardiology clinics until after the vaxx rollout. tinyurl.com/2p8v92em

Summarizing:
1. Vaxx related myocarditis is a potentially serious medical condition that can lead to damage/fibrosis in heart muscle
2. Fibrosis and scarring found within the heart muscle can lead 2long term complications related to cardiac arrhythmias & even sudden cardiac death

3. It is not yet known what the long term sequelae will be for those patients that have developed scarring and fibrosis related to vaccine myocarditis.
4. Rates of mRNA vax myocarditis in certain sub populations likely exceed the risks from SARS-Cov2 associated myocarditis.