Measurement of Left and Right Atrial Volume in Patients Undergoing Ablation for Atrial Arrhythmias: Comparison of a Manual versus Semiautomatic Algorithm of Real Time 3D Echocardiography

Abstract

Aims: Real time full-volume 3D echocardiography (3DE) allows rapid and noninvasive measurement of left (LA) and right atrial (RA) volume without geometric assumptions. Different algorithms from different commercial providers are available. Older software requires manual tracing of endocardial contours. Recently, software with semiautomatic endocardial contour-finding algorithms has become available, which considerably speeds up the procedure. Our aim was to compare, in the same dataset, both LA and RA volumes determined by an algorithm involving manual tracing to the corresponding volumes obtained by an algorithm with semiautomatic contour detection. Methods: Maximal atrial volumes were measured in 88 patients using a multiplane interpolation method algorithm based on manual planimetry of 8 slices. These volumes were compared with volumes determined by the QLAB 8.1 software using semiautomatic border detection. Results: Linear regression showed excellent correlation between volumes determined by manual and by semiautomatic software for both LA and RA (r 2 = 0.90 and 0.89, respectively, P < 0.001). Bland-Altman analysis of manual versus semiautomatic volume determination showed narrow 95% limits of agreement (À15.9 to +12.0 mL for LA volume and À13.9 to +12.2 mL for RA volume) with a minimal bias of À1.9 AE 7.0 mL and À0.8 AE 6.5 mL, respectively, by the semiautomatic method. Conclusion: The semiautomatic border detection method shows excellent correlation for maximal LA and RA volume determination compared to the more time-consuming, multiplane interpolation method, with only slight underestimation. The results indicate that values of LA and RA volumes obtained by either algorithm can be compared, for example, during follow-up examinations. (Echocardiography 2014;31:499-507)

Right Atrial Evaluation in Patients With Pulmonary Hypertension

“…Real‐time 3DE provides a more representative and realistic view of the heart chambers than MRI and is more accurate and reproducible than 2DE 21 . Moreover, it is easier to perform, with faster image acquisition compared to older manual 3D software, such as multiplanar volume‐rendered 3DE 17 . It is widely available and preferred for sequential LA volume measurement, even if not yet currently recommended, and has been validated against MRI and multiple‐detector computed tomography 12 , 16 , 21 , 22 , 37 .…”

“…This technique can accurately and rapidly determine cardiac chamber anatomy and function independent of the angle, without making geometric assumptions, and provides information concerning phasic volume changes during the cardiac cycle 14 – 16 . Furthermore, this modality is easier and faster to perform than older manual 3‐dimensional (3D) software 14 , 17 . Real‐time 3DE has been used extensively for assessment of ventricular volume and function, which has recently also been validated for left atrium (LA) determination 18 – 22 .…”

Three‐dimensional echocardiography to evaluate right atrial volume and phasic function in pulmonary hypertension

“…The novel aspects of our study in comparison with recent previous studies included the follows: (1) This study conducted in a cohort of patients who underwent real time 3DE examination provides new insights into the link between PH and RA performance. (2) Real time 3DE can be performed more easily and is noninvasive and inexpensive, which renders it more suitable for use in daily practice.…”

A jobb pitvar és bal kamra méretének és funkciójának összefüggései egészségesekben. Eredmények a háromdimenziós speckle-tracking echokardiográfiás MAGYAR-Healthy Tanulmányból

“…A különböző algoritmusokat használó RT3DE alkalmas módszernek bizonyult a JP-i térfogatváltozások szívciklust is fi gyelembe vevő noninvazív vizsgálatára, és számos tanulmány vizsgálta RT3DE-vel a JP-i térfogateltéréseket különböző kórké-pekben [13,14]. A 2DSTE szintén korszerű eljárásnak bizonyult a JP-i falmozgások kvantitatív jellemzésére, ahogy ez több közleményben is igazolást nyert [15,16].…”