PMC8326278_01
(A) Electrocardiogram findings before vaccination of SARS-CoV-2. (B) Electrocardiogram findings after vaccination of SARS-CoV-2.
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He received an electrocardiogram to get his SARS-CoV-2 vaccination, and no arrhythmia was found (Figure 1A). We performed another electrocardiogram, which showed atrial fibrillation with a rapid ventricular rate and occasional premature ventricular beats (Figure 1B).