Potter, EL and Ramkumar, S and Kawakami, H and Yang, H and Wright, L and Negishi, T and Marwick, TH, Association of asymptomatic diastolic dysfunction assessed by left atrial strain with incident heart failure, JACC: Cardiovascular Imaging, 13, (11) pp. 2316-2326. ISSN 1936-878X (2020) [Refereed Article]
Copyright 2020 American College of Cardiology Foundation
Background: LARS measures passive LA stretch and is a sensitive marker of left ventricular diastolic dysfunction (DD). The potential contribution of LARS to diastolic assessment is unclear.
Methods: Baseline clinical and echocardiographic assessments were obtained in 758 asymptomatic, community-dwelling elderly subjects (age 70 [interquartile range: 67 to 74] years, 53% women) with nonischemic HF risk factors. LARS-defined DD (LARS-DD) was assessed by speckle-tracking echocardiography, and grades were assigned as normal (>35%), grade 1 (25% to 35%) and grade 2 (≤24%). DD grade using current recommendations was compared with grading using LARS <24% in place of LAVI >34 ml/m2. Patients were followed for up to 2 years for incident HF.
Results: LA strain analysis was feasible in 738 (97%) patients; average LARS was 39% (range 34% to 43%). Incident HF was associated with LARS-DD grade; 8 (36%) of those had grade 2+, 14 (10%) had grade 1, and 39 (9%) had normal function (p < 0.001). LARS-DD grade 2+ predicted incident HF after adjustment for clinical and echocardiographic markers (adjusted hazard ratio: 2.5; 95% confidence interval: 1.02 to 6.3; p = 0.049); there was no significant HF risk associated with LARS-DD grade 1. Dichotomized abnormal LARS <24% had an adjusted hazard ratio of 2.9 (95% confidence interval: 1.25 to 6.79; p = 0.013). Substituting LARS for LAVI provided a 75% reduction in indeterminate diastolic function; all were recategorized as normal. There was no increased risk associated normal diastolic function by this grading compared to conventional grading (C-statistic = 0.76 for both models).
Conclusions: LARS-DD grade 2+ is associated with incident HF in the elderly, independent of LAVI. The substitution of LARS for LAVI reduces the number of indeterminate cases without impacting prognosis in normal diastolic function and grade 1 DD.
|Item Type:||Refereed Article|
|Keywords:||diastolic dysfunction, heart failure, left atrial strain|
|Research Division:||Biomedical and Clinical Sciences|
|Research Group:||Cardiovascular medicine and haematology|
|Research Field:||Cardiology (incl. cardiovascular diseases)|
|Objective Group:||Clinical health|
|Objective Field:||Diagnosis of human diseases and conditions|
|UTAS Author:||Yang, H (Ms Hilda Yang)|
|UTAS Author:||Negishi, T (Dr Tomoko Negishi)|
|UTAS Author:||Marwick, TH (Professor Tom Marwick)|
|Web of Science® Times Cited:||7|
|Deposited By:||Menzies Institute for Medical Research|
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