Past, Present, and Future of Evaluating Diastolic Function
1Department of Cardiology, Methodist DeBakey Heart and Vascular Center, Houston, TX.
Insights
Diagnosing diastolic dysfunction and heart failure with preserved ejection fraction is evolving. New echocardiography methods and artificial intelligence show promise for more accurate assessments beyond current guidelines.
Area of Science:
- Cardiology
- Medical Imaging
- Artificial Intelligence in Medicine
Background:
- Left ventricular diastolic function assessment has transitioned from invasive pressure measurements to primarily echocardiography.
- Current diagnostic methods involve mitral inflow, tissue Doppler, tricuspid regurgitation, pulmonary vein flow, left atrial size/function, and estimated right atrial pressure.
- The 2025 American Society of Echocardiography guidelines offer an algorithm for mean left atrial pressure estimation, validated in a large multicenter study.
Purpose of the Study:
- To review current and emerging methods for assessing left ventricular diastolic function.
- To evaluate the diagnostic value of updated echocardiographic algorithms for heart failure with preserved ejection fraction.
- To explore the role of artificial intelligence in diagnosing diastolic dysfunction and heart failure with preserved ejection fraction.
Main Methods:
- Review of current echocardiographic parameters for diastolic function assessment.
- Validation of a new algorithm for mean left atrial pressure estimation against invasive methods and clinical scores.
- Exploration of novel techniques like shear wave propagation velocity, left atrial conduit volume, and valve opening timing.
- Application of artificial intelligence, including rule-based algorithms and deep learning neural networks.
Main Results:
- The validated algorithm for mean left atrial pressure estimation demonstrated incremental value in diagnosing heart failure with preserved ejection fraction.
- Newer echocardiographic approaches show promise for studying diastolic function.
- Artificial intelligence models are being developed for diagnosing and grading diastolic dysfunction and heart failure with preserved ejection fraction.
Conclusions:
- Echocardiography remains central to diastolic function assessment, with ongoing advancements improving accuracy.
- Validated algorithms and novel imaging techniques enhance the diagnosis of diastolic dysfunction and heart failure with preserved ejection fraction.
- Artificial intelligence holds significant potential to further refine the diagnosis and management of these conditions.
Abstract:
The assessment of left ventricular diastolic function started with invasive pressure measurements and is currently primarily based on echocardiographic imaging. The current approach to the diagnosis of diastolic function relies on mitral inflow velocities, tissue Doppler early diastolic velocity of the mitral annulus, peak velocity of tricuspid regurgitation, pulmonary vein flow, left atrial size and function, and the noninvasive estimation of right atrial pressure. The recommended algorithm in the 2025 American Society of Echocardiography guidelines for estimation of mean left atrial pressure has been validated in a large multicenter study that included 951 patients. Further, that algorithm has shown incremental value to triaging clinical scores in achieving accurate heart failure with preserved ejection fraction diagnosis, against the invasive gold standard. Newer promising approaches have been developed over the past few years to study left ventricular diastolic function, including shear wave propagation velocity, left atrial conduit volume, and timing of mitral and tricuspid valve opening in the apical 4-chamber view. Artificial intelligence has been applied to this field as a rule-based decision tree algorithm, and as deep-learning neural networks to train models for diagnosing and grading diastolic dysfunction, and for diagnosing heart failure with preserved ejection fraction.
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