摘要:Abstract A 44-year-old female with a diagnosis of mitochondrial myopathy, encephalopathy and stroke-like episodes (MELAS) syndrome had progressive left ventricular hypertrophy (LVH) on echocardiogram. A Holter monitor demonstrated episodes of non-sustained atrial tachycardia, a finding not been previously described in this population. This unique case of {MELAS} syndrome demonstrates the known associated cardiac manifestation of {LVH} and the new finding of atrial tachycardia which may represent the potential for subclinical arrhythmia in this population.