A 17-year-old male with acute myocarditis following mRNA-1273 vaccination in Japan.

Vaccinations are the main tool being used to control the COVID-19 pandemic. When the Japanese Ministry of Health approved the Moderna mRNA-1273 vaccination in May 2021, it was limited to patients over 18 years old; however, using the additional data of efficacy and safety from clinical trials, vaccination was approved for 12- to 17-year-olds in Japan in July 2021. A previous study reported that myocarditis after the mRNA-1273 vaccination was more prevalent in young men; however, no patients under 18 years old with myocarditis diagnosed by cardiovascular magnetic resonance (CMR) findings after mRNA-1273 vaccination have been reported in Japan. In the present case, a 17-year-old healthy male developed arthralgia and had fever on the day of the second mRNA-1273 vaccination for severe acute respiratory syndrome coronavirus 2. Three days after the vaccination, the patient felt severe chest pain with broad ST elevations on electrocardiography and troponin T elevations. Symptoms and findings rapidly improved; however, on CMR, myocarditis remained. Thus, it is necessary to be vigilant of potential acute myocarditis in young men following mRNA-1273 vaccination. Learning objective: Although it is very rare, acute myocarditis after mRNA-1273 (Moderna) vaccination developed within 3-5 days following the second dose of the vaccine.Most reported cases were mild or moderate in severity, but there were cases of cardiogenic shock. We need to be vigilant of acute myocarditis in young men following mRNA-1273 vaccination.

Ventricular Fibrillation Induced by Takotsubo Syndrome with Congenital Long QT Syndrome.

We herein report a case of congenital long QT syndrome (LQTS) in which the QT interval was prolonged by Takotsubo syndrome (TTS), inducing ventricular fibrillation (VF). The patient was a 55-year-old woman who had been diagnosed with LQTS. Cardiopulmonary arrest occurred while coughing during sleep. VF was observed, and her heartbeat returned after two defibrillations. An electrocardiogram showed marked QT prolongation and large negative T waves. Echocardiography demonstrated hyperkinesis at the base of the left ventricle and akinesis at the apex. As there was no significant stenosis in the coronary artery, she was diagnosed with TTS.

Nondominant parietotemporal cortical dysplasia manifesting as hypermotor seizures.

We describe the case of a 33-year-old man with nondominant right parietotemporal cortical dysplasia. Habitual seizures were violent, ballistic movements of the extremities with pelvic thrusting, resembling complex gestural automatisms or "hypermotor seizures." Scalp electroencephalography (EEG) and interictal [(123)I]iomazenil single-photon-emission computed tomography revealed an epileptogenic zone including a lesion observed on magnetic resonance imaging. Corticectomy of the inferior parietal lobule was performed via invasive EEG monitoring, but resulted in failed seizure control. The middle and posterior temporal cortices were additionally resected in the second surgery. The patient experienced contralateral hemianopsia postoperatively, but no hemispatial neglect. Hypermotor seizures have not been seen for 1.5years since surgery. This is the first description of a patient with a parietal lobe lesion experiencing hypermotor seizures. The middle and posterior temporal cortices were considered epileptogenic together with the inferior parietal lobule in the present case.