Global and regional myocardial function quantification by two-dimensional strain in Takotsubo cardiomyopathy

Abstract

This study sought to characterize global and regional systolic function in Takotsubo cardiomyopathy (TC) using two-dimensional (2D) strain imaging. Twelve consecutive patients (11 women, 1 man) underwent 2D echocardiography on admission and on early follow-up (34 +/- 16 days). Two-dimensional images were analysed to measure longitudinal and radial strain and to calculate post-systolic shortening (PSS) and the post-systolic index (PSI). Mean age was 64 +/- 14 years. Upon presentation ejection fraction, average longitudinal and radial strains were 42 +/- 9%, -10.6 +/- 5.5%, and 20.1 +/- 17.3%, respectively. Values improved to 59 +/- 8%, -17.6 +/- 3.0%, and 50.2 +/- 17.0%, respectively (all P < 0.001). PSS was present in 69% of segments upon presentation and in 53% of segments upon follow-up. PSI was -0.16 at baseline and improved to -0.06 upon follow-up (P < 0.001). Patients with TC show abnormal global and regional strain patterns during the acute phase of the disease which improve over time. However, subtle abnormalities of regional LV function seem to persist into the early follow-up period as suggested by the presence of PSS in more than half of LV segments. Long-term follow-up studies are needed to clarify whether these subtle abnormalities will further improve.