question: Is micro RNA 1 (miR-1) implicated in cardiac arrhythmias?
answer: Yes. miR-1 overexpression may contribute to the increased susceptibility of the heart to AVB, which provides us novel insights into the molecular mechanisms underlying ischemic cardiac arrhythmias. As miR-1 has been shown in animal models and clinical studies to contribute to arrhythmogenesis by regulating pacemaker channel genes, our finding of miR-1 up-regulation in patients with myocardial infarction indicates that it might be responsible for the higher risk for arrhythmias in these patients.