Biplane Area-length Method Underestimates 3D Left Atrial Volume in Patients with Atrial Fibrillation
Anthony Maroun1, Justin Baraboo1, Suvai Gunasekaran1, Julia Hwang1, Sophia Liu1, Daniel Kim1, Philip Greenland2, Rod Passman3, Bradley Allen1, Michael Markl1, and Maurice Pradella1,4
1Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States, 2Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States, 3Department of Cardiology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States, 4Department of Radiology, University Hospital Basel and University of Basel, Basel, Basel, Switzerland
The biplane area-length method is routinely used in clinical settings for left atrial volume (LAV) estimation. This technique is time-resolved but relies on geometrical assumptions of an ellipsoidal shape to estimate the LAV. In contrast, quantification derived from 3D segmentations on late gadolinium-enhanced magnetic resonance imaging and contrast-enhanced magnetic resonance angiography are static but do not rely on geometric assumptions. We compared the LAV estimation from these 3 methods in patients with atrial fibrillation and found a significant underestimation by the biplane area-length technique, indicating that this method may not capture the entire LAV in patients with complex anatomy.
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