Global longitudinal strain and long-term outcomes in asymptomatic extracardiac sarcoid patients with no apparent cardiovascular disease

PurposeGlobal longitudinal strain (GLS) is increasingly accepted as a predictor of mortality in various clinical settings. This study tested the hypothesis that GLS is associated with increased event rate in patients with extracardiac sarcoidosis, who have no overt symptoms of cardiovascular disease and preserved ejection fraction (EF). MethodsWe retrospectively studied 117 patients with extracardiac sarcoidosis and 45 age- and sex-matched controls, who underwent comprehensive echocardiographic study, while GLS was measured by an offline speckle tracking algorithm. Patients who had signs and symptoms of cardiovascular disease at the time of the examination were excluded from the study. Patients were followed for an average of 57.1months. Primary endpoint was defined as a composite endpoint of heart failure-related hospitalizations, need for device therapy, arrhythmias, and all-cause mortality. ResultsThe age of patients was 426years old (43 men). Events were recorded in 10 patients (8.5%). Tissue Doppler revealed E/Em 7.9 +/- 3.5, while EF was 54.2 +/- 3.5%. Global longitudinal strain was 14.4 +/- 3%, and a cutoff value -13.6% for GLS was considered more associated with adverse outcomes (AUC 0.84). After adjustment for multiple potential confounders (age, gender, hypertension, diabetes, E/Em, and EF), GLS remained strongly associated with adverse outcomes (HR 0.8, 0.63 to 0.98 95% C.I, P=.04). ConclusionsIn conclusion, among patients with extracardiac sarcoidosis and no symptoms of cardiovascular disease, even when EF is preserved, GLS seems to be strongly associated with adverse future events.