Noninvasive Assessment of Left Ventricular End-Diastolic Pressure Using Machine Learning Derived Phasic Left Atrial Strain.

Noninvasive Assessment of Left Ventricular End-Diastolic Pressure Using Machine Learning Derived Phasic Left Atrial Strain. - 2023

BACKGROUND: While transthoracic echocardiography (TTE) assessment of left ventricular end-diastolic pressure (LVEDP) is critically important, the current paradigm is subject to error and indeterminate classification. Recently, peak left atrial strain (LAS) was found to be associated with LVEDP. We aimed to test the hypothesis that integration of the entire LAS time curve into a single parameter could improve the accuracy of peak LAS in the noninvasive assessment of LVEDP with TTE. CONCLUSIONS: LASi allows the detection of elevated LVEDP using invasive measurements as a reference, at least as accurately as peak LAS and current diastolic function guidelines algorithm, with the advantage of no indeterminate classifications in patients with measurable LAS. Copyright © The Author(s) 2023. Published by Oxford University Press on behalf of the European Society of Cardiology. All rights reserved. For permissions, please e-mail: [email protected]. METHODS: We retrospectively identified 294 patients who underwent left heart catheterization and TTE within 24 hours. LAS curves were trained using machine learning (100 patients) to detect LVEDP>15mmHg, yielding the novel parameter LAS index (LASi). The accuracy of LASi was subsequently validated (194 patients), side-by-side with peak LAS and ASE/EACVI guidelines, against invasive filling pressures. RESULTS: Within the validation cohort, invasive LVEDP was elevated in 116 (59.8%) patients. The overall accuracy of LASi, peak LAS and ASE/EACVI algorithm was 79%, 75%, and 76%, respectively (excluding 37 patients with indeterminate diastolic function by ASE/EACVI guidelines). When the number of LASi indeterminates (defined by near-zero LASi values) was matched to the ASE/EACVI guidelines (n=37), the accuracy of LASi improved to 87%. Importantly, among the 37 patients with ASE/EACVI-indeterminate diastolic function, LASi had an accuracy of 81%, compared to 76% for peak LAS.


English

2047-2404

10.1093/ehjci/jead231 [doi] 7274075 [pii]


IN PROCESS -- NOT YET INDEXED--Automated


MedStar Health Research Institute


Journal Article

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