AGT and persistent truncus arteriosus: The high-frequency/high-amplitude Ca2+ oscillations characteristic of TAC and the consequent intermittent nature of the resulting TRPM4 activation, as distinct from the persistent activation associated with angiotensin II-induced hypertrophy, may mean that TAC-induced TRPM4 activation does not reduce the driving force for Ca2+ influx via SOCE that characterises the anti-hypertrophic action of TRPM4 in angiotensin II-induced hypertrophy (see above).