CALCA and persistent truncus arteriosus: The calculated mean HW/BW was significantly greater in TAC mice compared to sham mice (P < 0.005, TAC vs. sham) while the increase in HW/BW after TAC was significantly attenuated by α‐CGRP administration (P < 0.005, TAC‐α‐CGRP vs. TAC; Fig. 2B).