epimyocardium

epimyocardium

[‚ep·ə‚mī·ə′kärd·ē·əm]
(embryology)
The layer of the embryonic heart from which both the myocardium and epicardium develop.
References in periodicals archive ?
The diaphragmatic and pericardial defects are closely related to either the total or partial failure of septum transversum development, whereas the cardiac abnormalities result from the faulty development of the epimyocardium.
Sant'Anna commented, "The normal technique of `biventricular pacing' by placing the electrode in the epimyocardium at the optimal position requires a thoracotomy.