15-lead ECGPrecordial swirlprecordial Swirl due to Right Ventricular MIRCA Proximal with Collateral circulationright sided leadsSeptal STEMI5 Min Read Steve SmithonMarch 13, 2013 Septal STEMI with ST elevation in V1 and V4R, and reciprocal ST depression in V5, V6 This was sent to me by a reader named Aaron. A 36 yo male smoker presented to the ED with chest pain. It had started the night before as…