%0 Journal Article %T Comparison of the Mitral Regurgitation Volume Derived From Transthoracic Echocardiography Between the HeartModel and Continuity Equation Methods in Patients With Severe Mitral Regurgitation %J Iranian Heart Journal %I Iranian Heart Association %Z %A Samiei, Niloufar %A Pasebani, Yeganeh %A Rafati, Ali %A Rezaei, Yousef %A Hosseini, Saeid %A Jafari, Nasim %A Sarejloo, Shirin %A Sharifi, Farshid %D 2023 %\ 01/01/2023 %V 24 %N 1 %P 62-68 %! Comparison of the Mitral Regurgitation Volume Derived From Transthoracic Echocardiography Between the HeartModel and Continuity Equation Methods in Patients With Severe Mitral Regurgitation %K Transthoracic echocardiography %K HeartModel %K Continuity equation %K Mitral regurgitation %R %X 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) %U http://journal.iha.org.ir/article_163880_a45aae82c28d56be20f7a8ae417cc80e.pdf