Key result
Impaired left atrial late diastolic strain rate linked to ~2.8-fold higher death or transplantation in non-ischemic HF.
Why the study?
The long-term prognostic value of CMR feature-tracking derived left atrial strain parameters in non-ischemic HF patients with LVEF ≤ 35% remains unclear.
Cohort (n=214)
No
Hazard Ratio: 2.761 (95% CI 1.12–6.804)
p-value: p=0.027
CMR-derived left atrial late diastolic strain rate (SRa) is a significant and independent predictor of long-term mortality and heart failure hospitalization in patients with non-ischemic cardiomyopathy and severely reduced LVEF.
SRa may aid risk stratification in non-ischemic HF with LVEF ≤35%; leaves open prospective validation before clinical adoption.
Background Heart failure (HF) patients with LVEF ≤ 35% remain at high risk of adverse outcomes. Cardiac magnetic resonance (CMR) feature-tracking (FT) enable the assessment of left atrial (LA) deformation, but the long-term prognostic value of LA strain parameters in this high-risk population remains unclear. This study evaluated whether CMR-derived LA strain and strain-rate parameters are associated with long-term outcomes in HF patients with LVEF ≤ 35%. Methods This retrospective study included 214 consecutive patients with non-ischemic HF and LVEF ≤ 35% who underwent CMR between March 2018 and December 2020. Conventional CMR parameters and FT derived strain parameters were assessed. The primary endpoint was a composite of all-cause death or heart transplantation. The secondary endpoint was unplanned hospitalization for worsening heart failure. Cox proportional hazards models, Kaplan-Meier survival analysis, and model discrimination assessed by C-index were used to evaluate the prognostic value of LA strain parameters. Results During a median follow-up interval of 61 months (IQR, 52 - 68.25), 32 patients reached the primary endpoint and 96 patients reached the secondary endpoint. After adjustment for clinical and CMR parameters, SRa remained associated with the primary endpoint [hazard ratio (HR), 2.761; 95% confidence intervals (CI), 1.120 - 6.804; P = 0.027] and the secondary endpoint (HR, 1.862; 95% CI, 1.163 - 2.981; P = 0.010). Hemoglobin and LV end-diastolic volume index (LVEDVi) were additionally associated with the primary endpoint, while atrial fibrillation history and LVEDVi were associated with the secondary endpoint. Conclusions In HF patients with LVEF ≤ 35%, CMR-FT derived SRa was associated with the risks of all-cause death or heart transplantation and heart failure worsening hospitalization. SRa may serve as a potential complementary prognostic marker in severe LV systolic dysfunction.
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Qian et al. (2026) conducted a cohort in Non-ischemic heart failure with severely reduced LVEF (n=214). CMR feature-tracking derived left atrial late diastolic strain rate (SRa) vs. Unexposed/Reference (analyzed as continuous variable or higher SRa vs lower SRa) was evaluated on Composite of all-cause death or heart transplantation (HR 2.761, 95% CI 1.120-6.804, p=0.027). Left atrial late diastolic strain rate (SRa) was independently associated with an increased risk of all-cause death or heart transplantation (HR 2.761) in non-ischemic heart failure.
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