Iranian Heart Journal

Iranian Heart Journal

Comparison of the Mitral Regurgitation Volume Derived From Transthoracic Echocardiography Between the HeartModel and Continuity Equation Methods in Patients With Severe Mitral Regurgitation

Document Type : Original Article

Authors
Niloufar Samiei 1
Yeganeh Pasebani 1
Ali Rafati 1
Yousef Rezaei 1
Saeid Hosseini 1
Nasim Jafari 2
Shirin Sarejloo 2
Farshid Sharifi 1
1 Heart Valve Disease Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran.
2 Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran.
Abstract
Background: We compared the mitral regurgitation (MR) volume measured between 2 methods: the 2D continuity equation transthoracic echocardiography (2D CE-TTE) and the 3D HeartModel transthoracic echocardiography (3D HM-TTE).
 
Methods: Thirty-five patients at a mean age of 53.31 years (SD=15.16) were enrolled. All the patients were diagnosed with severe MR via transesophageal echocardiography. For the comparison of the MR volumes yielded by the 2 methods, the Bland–Altman chart and linear regression analyses were conducted.
 
Results: The Bland–Altman analysis showed a mean difference of −89.30 mL between the MR volume measurements of the 2 methods, and the linear regression resulted in a standardized coefficient β of −0.831 (P<0.001). Hence, the analysis showed a significant proportional bias between 2D CE-TTE and 3D HM-TTE.
 
Conclusions: Overall, we observed that 2D CE-TTE overestimated the MR volume measured by 3D HM-TTE by about 30%. (Iranian Heart Journal 2023; 24(1): 62-68)
Keywords
Transthoracic echocardiography
HeartModel
Continuity equation
Mitral regurgitation
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Iranian Heart Journal
Volume 24, Issue 1
Winter 2023
Pages 62-68