Researchers in Taiwan have added to the increasingly negative picture of the impact the mRNA Covid vaccines have on the hearts of young men.

The researchers conducted electrocardiograms (ECGs), which measure the heart rhythm, on 4,928 high schoolers in Taipei City, the capital of Taiwan, before and after their second Pfizer shot. Over 90 percent of the students were male.

They found 51 students had significant changes in their ECGs after the second Pfizer jab. One of those was diagnosed with myocarditis, and four more had “significant” heart rhythm disturbances. Those included a student with premature ventricular contractions, which can raise the risk of sudden cardiac death.

“The arrhythmia triggering effect by BNT162b2 [Pfizer] vaccine needs further study to elucidate,” the scientists wrote.

SOURCE

Of note, four of the five students with the most serious problems did not report chest pain or other obvious problems after the second shot.

Another 10 students had suspected pericarditis, an inflammation of the sac around the heart muscle, but echocardiograms did not confirm the diagnosis. The researchers characterized the myocarditis case as “mild,” and said all the students improved over time.

The scientists published their findings last week in the peer-reviewed European Journal of Pediatrics.

The researchers also reported that almost one in five of the students reported chest pain, heart palpitations or other problems after their second jab. The rate was far higher after the second shot than the first, suggesting that the vaccine itself - not anxiety around it - caused the problems.

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