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  • Title: Prognostic value and time course evolution left ventricular global longitudinal strain in septic shock: an exploratory prospective study.
    Author: Bazalgette F, Roger C, Louart B, Daurat A, Bobbia X, Lefrant JY, Muller L.
    Journal: J Clin Monit Comput; 2021 Dec; 35(6):1501-1510. PubMed ID: 33216237.
    Abstract:
    Our main objective was to describe the course of GLS during the first days of septic shock and to assess the agreement between GLS values and longitudinal strain measured in apical four chambers. A prospective observational single centre study was conducted at the Nimes University Hospital's ICU. All patients admitted for a diagnosis of septic shock without pre-existing heart disease were eligible. Echocardiography (LVEF and GLS) was performed on the first day, and repeated once between day 3 and day 5 then once between day 6 and day 8. We enrolled 40 consecutive patients. Four patients were excluded. In overall population, GLS at T1 was impaired (- 11.0%, IQR(interquartile range) [- 15; - 10]). On T2 exams, a significant improvement of the GLS (- 11% vs - 16% p = 0.02) was observed whereas LVEF remained stable over time. A good agreement between GLS and longitudinal strain measured on a four chambers view was found. Based on the Bland and Altman method, the mean of differences for T1 exams was 0.1 (95% CI [- 0.6; 0.8]) with limits of agreement ranging from - 4 to 4. Myocardial strain is depressed at the early phase of septic shock and improves over time. A single measurement of LS4C view appears sufficient at bedside.
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