94M with CAD s/p 4v-CABG, CHF, CRI presented with vfib arrest. Initial labs significant for K 2.7. EKG showed sinus rhythm, HR 80 with LAD, prolonged PR, TD 0.5 to 1mm in V4-V6. Echo showed Mildly depressed global left ventricular function, mild to moderate aortic regurgitation and mild mitral regurgitation.