Translating thyroid hormone into clinical practice: lessons learned from the analysis on data available from the ThyRepair study.

Background: Thyroid hormone (TH) appears to have a reparative action on the postinfarcted myocardium. This novel action was recently tested in a pilot, randomized, double-blind, placebo-controlled trial (ThyRepair). The present study performed a analysis of data from the ThyRepair study to provide further insights into the novel actions of TH on the human postischemic myocardium.

Effects of Acute Triiodothyronine Treatment in Patients with Anterior Myocardial Infarction Undergoing Primary Angioplasty: Evidence from a Pilot Randomized Clinical Trial (ThyRepair Study).

Thyroid hormone has a differential action on healthy and ischemic heart. Triiodothyronine (T3) administration improved postischemic cardiac function while it limited apoptosis in experimentally induced ischemia. Thus, the present study investigated the potential effects of acute liothyronine (LT3) treatment in patients with anterior myocardial infarction.

Long-term thyroxine administration protects the heart in a pattern similar to ischemic preconditioning.

We have previously shown that long-term thyroxine administration can protect the heart against ischemia. In the present study, we investigated whether thyroxine-induced cardioprotection can mimic the pattern of protection that is afforded by a well-established cardioprotective means such as ischemic preconditioning. In a Langendorff-perfused rat heart preparation, after an initial stabilization, normal and thyroxine-treated hearts were subjected to 20 minutes of zero-flow global ischemia followed by 45 minutes of reperfusion.