Conclusion
The timing of the initiation of the corticosteroid therapy in patients
with CS would affect the echocardiographic response and long-term
prognosis following an upgrade to CRT therapy. Earlier initiation of
corticosteroids seems to improve the long-term outcomes in patients with
CS. Unlike the patients with other NICMs, the echocardiographic response
to an upgrade to CRT in patients with CS should be carefully evaluated
because of the complex etiologies and impact of immunosuppressive
therapy.