Ventricular tachycardia because of myocardial infarction after COVID‐19 vaccination

[...]of the concern of vascular side effects of the vaccine, repeated CAG was arranged. [...]the troponin-I level showed mild elevation (0.16 ng/ml), the D-dimer level is higher than 4 times the upper limit of normal (2.438 μg/ml), and his platelet level decreased from 278 to 110 103/μl. The 12-lead electrocardiogram (ECG) showed sinus rhythm with the initiation of ventricular tachycardia and new subtle q waves in lead I and aVL (Figure 2). During admission, enzyme-linked immunosorbent assay (ELISA) of Anti-Human Heparin Platelet Factor 4 (HPF-4) antibody was checked but the result is negative (Optical Density value: 0.229, reference: positive if OD > 0.4).