Fig. 2.

M-mode images from echocardiography performed at various time points during the course of the illness. Baseline study was performed two years before the patient developed the mitochondrial crisis (no parasternal short-axis view was available for comparison). The Day 2 and Day 8 echocardiograms show progressive deterioration of left ventricular systolic function. The final study, performed 3 months into the patient's clinical recovery, demonstrates improvement back to baseline.