A substack article from Sept 2022.

Inadvertent intravenous injection of the Covid jab could explain the damage we are seeing. A technical piece but for those interested and able to interpret the physiological effects it opens up possible mechanisms of harm.

The lack of aspiration when injecting the solution may be why we experience so many immediate Adverse Events. Fully, GMG and I were taught to ALWAYS aspirate (draw back on the plunger to create negative pressure) to determine if we are in a blood vessel. A drop of blood will show up in the carpule if in a vessel. We reposition and try again. Only when certain that we are not in a vessel do we slowly inject. Intravenous injection occurs very infrequently this way. In Dentistry it usually causes a racing heart from the epinephrine. Rapid onset, rapid dispersion.

This article gives a logical reason for many of the heart and vessel damages we see.

Most videos showing the Covid 19 Jabs do not show aspiration.
Of course if some were saline (to Biden, The Turd) as has been postulated, it does not matter where the jab goes.

https://covidmythbuster.substack.com/p/when-and-how-can-vaccine-particles?utm_source=substack&utm_medium=email