Figure 1.

AED Defibrillation, 12-Lead ECG, and Imaging in a Pediatric Patient After Resuscitated Cardiac Arrest

(A) Defibrillation with 200 J for ventricular fibrillation. (B) 12-Lead ECG demonstrating normal sinus rhythm, left ventricular hypertrophy by voltage, and diffuse ST-segment elevation. (C) Cardiac computed tomography (coronal view) demonstrating left main coronary artery ostial stenosis and acute turn of proximal LMCA (red arrow). (D and E) IVUS demonstrating dynamic LMCA ostial stenosis (diastole = light blue tracing; systole = yellow tracing). (D) IVUS imaging of the LMCA distal to the lesion. This region is widely patent with an area of 17.9 mm². (E) IVUS image at the lesion in the LMCA during compression showing ∼60% narrowing to an area of 7.5 mm². (F) Cardiac computed tomography (coronal view) demonstrating normal caliber of LMCA with no evidence of ostial stenosis postsurgical repair (yellow arrow). ECG = electrocardiogram; IVUS = intravascular ultrasound; LMCA = left main coronary artery.