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Physiol Rep. 2018 Sep;6(17):e13828. doi: 10.14814/phy2.13828.

Assessment of diastolic function and atrial remodeling by MRI - validation and correlation with echocardiography and filling pressure.

Author information

1
Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut.
2
Department of Clinical Physiology, Skane University Hospital, Lund University, Lund, Sweden.
3
Department of Biomedical Engineering, Faculty of Engineering, Lund University, Lund, Sweden.
4
Department of Cardiology, Yale University, New Haven, Connecticut.
5
Department of Electrical Engineering, Universidad de Ingenieria y Tecnologia - UTEC, Lima, Peru.
6
San Francisco Department of Radiology and Biomedical Imaging, University of California, San Francisco, California.
7
Section of Cardiovascular Medicine, Department of Medicine, Yale University, New Haven, Connecticut.
8
Wallenberg Center for Molecular Medicine, Lund University, Lund, Sweden.

Abstract

Atrial fibrosis can be estimated noninvasively by magnetic resonance imaging (MRI) using late gadolinium enhancement (LGE), but diastolic dysfunction is clinically assessed by transthoracic echocardiography (TTE), and rarely by MRI. This study aimed to evaluate well-established diastolic parameters using MRI, and validate them with TTE and left ventricular (LV) filling pressures, and to study the relationship between left atrial (LA) remodeling and parameters of diastolic function. The study retrospectively included 105 patients (53 ± 16 years, 39 females) who underwent 3D LGE MRI between 2012 and 2016. Medical charts were reviewed for the echocardiographic diastolic parameters E, A, and e' by TTE, and pressure catheterizations. E and A were measured from in-plane phase-contrast cardiac MRI images, and e' by feature-tracking, and validated with TTE. Interobserver and intraobserver variability was examined. Furthermore, LA volumes, function, and atrial LGE was correlated with diastolic parameters. Evaluation of e' in MRI had strong agreement with TTE (r = 0.75, P < 0.0001), and low interobserver and intraobserver variability. E and A by TTE showed strong agreement to MRI (r = 0.77, P = 0.001; r = 0.73, P = 0.003, for E and A, respectively). Agreement between E/e' by TTE and MRI was strong (r = 0.85, P = 0.0004), and E/e' by TTE correlated moderately to invasive pressures (r = 0.59, P = 0.03). There was a strong relationship between LA LGE and pulmonary capillary wedge pressure (r = 0.81, P = 0.01). In conclusion, diastolic parameters can be measured with good reproducibility by cardiovascular MRI. LA LGE exhibited a strong relationship with pulmonary capillary wedge pressure, an indicator of diastolic function.

KEYWORDS:

Cardiovascular magnetic resonance imaging; diastolic function; echocardiography; left atrial late gadolinium enhancement; left ventricular filling pressure

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