TNNT2 and myocardial ischemia: The time-course RIA analysis of CGRP, TXB2, AngII, ET, BNP, and cTnT showed that myocardial ischemia caused the increase of serum TXB2, AngII, cTnT, ET, and BNP (P < 0.01 or P < 0.05, Figures 2(b), 2(c), 2(d), 2(e), and 2(f)).