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James D Thomas - One of the best experts on this subject based on the ideXlab platform.
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:Background— This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). Methods and Results— Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aα; posterior, Pα) were measured. In ICM-MR, Aα measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39±5°, 34±6°, and 27±5°, respectively; P<0.01), whereas Pα showed no significant difference in any of the 3 AP Planes (61±7°, 57±7°, and 56±7°, ...
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:BACKGROUND: This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). METHODS AND RESULTS: Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aalpha; posterior, Palpha) were measured. In ICM-MR, Aalpha measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39+/-5 degrees, 34+/-6 degrees, and 27+/-5 degrees, respectively; P 0.05). In DCM-MR, both Aalpha (38+/-8 degrees, 37+/-9 degrees, and 36+/-7 degrees, P>0.05) and Palpha (59+/-6 degrees, 58+/-5 degrees, and 57+/-6 degrees, P>0.05) revealed no significant differences in the 3 Planes. CONCLUSIONS: The pattern of MV deformation from the medial to the Lateral side was asymmetrical in ICM-MR, whereas it was symmetrical in DCM-MR. RT3DE is a helpful tool for differentiating the geometry of the mitral apparatus between these 2 different types of functional mitral regurgitation.
Maria Helena Waack De Almeida - One of the best experts on this subject based on the ideXlab platform.
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Influencia de tecnicas de polimerização sobre adaptação das bases de protese total
[s.n.], 2018Co-Authors: Maria Helena Waack De AlmeidaAbstract:Orientadores: Saide Sarckis Domitti, Simonides ConsaniDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: O objetivo desta pesquisa foi verificar as alterações de adaptação das bases de prótese total, confeccionadas com resina acrílica ativada termicamente, ocorridas sob a influência de 3 técnicas de polimerização: convencional, por calor seco e por energia de microondas. Foram confeccionados 30 modelos padrões em gesso pedra, a partir de um molde de borracha representando uma arcada superior desdentada normal. Sobre os modelos foram confeccionadas as bases de prova, que foram divididas aleatoriamente em 3 grupos de 10 elementos e incluídos. em mufla pela técnica convencional, a fim de receber os seguintes tratamentos experimentais: Grupo 01: prensagem com resina termopolimerizável (Clássico) e polimerização em banho de água aquecida a 74+2°C por 9 horas (método convencional). Grupo 02: prensagem com resina termopolimerizável (Clássico) e polimerização por calor seco (estufa) a 74+2°C por- 9 horas. Grupo 03: prensa$em com resina termopolimerizável (Acron MC) e polimerização em forno de microondas a 900 W por 3 minutos. A seguir, as bases em resina, limpas e acabadas, foram fixadas em seus respectivos modelos com adesivo instantâneo (Super Bonder). O conjunto base de prótese modelo de gesso foi posicionado e fixado em um aparelho específico para obtenção das secções. Orientados por .guias existentes na mesa de fixação, com auxílio de serra manual, foram executados 3 cortes látero laterais passando pela região correspondentes à distal de caninos direito e esquerdo (A), mesial de primeiros molares direito e esquerdo (B) e região "pos-dam" (C) e 3 cortes ântero-posteriores passando pela região correspondente à crista do rebordo direito (A) e esquerdo (C) e região mediana do palato (B). A alteração dimensional ocorrida na resina acrílica foi avaliada por meio de um microscópio comparador, em 5 pontos referenciais para cada tipo de corte. Os resultados numéricos obtidos foram submetidos à análise estatística e as médias ao Teste de Tukey ao nível de significância de 5%. Todas as técnicas avaliadas produziram distorções, sem diferença estatisticamente significante. Quando o desajuste foi analisado dentro de uma mesma técnica, verificou-se que no Grupo 01 (Termopolimerizadora) não houve diferença estatisticamente significante entre os cortes látero-laterais. Entretanto, no Grupo 02 (Estufa), o corte A foi semelhante ao B e o B ao C, enquanto no Grupo 03 (Microondas), os dados demonstraram o mesmo comportamento estatístico entre os cortes B e C, porém diferentes do A, que mostrou a melhor adaptação. Por outro lado, quando os cortes ântero-posteriores foram analisados, houve comportamento estatístico semelhante entre eles nas 3 técnicas de polimerização estudadas. Neste caso, o corte B foi diferente estatisticamente dos cortes A e C, mostrando o maior desajuste. Independente da técnica de polimerização e da localização dos cortes; não houve diferença estatística quando se comparou os índices de desajuste entre os cortes látero-Iaterais e ântero-posterioresAbstract: The purpose of this study was to veri1)1 the denture bases accuracy, made with heat-cured acrylic resin, occurred under the influence of three cycles of polymerization: conventional, by dry heat and with microwave. energy. Thirty master cast were made in stone plaster from a rubber cast, representing a normal nondental arch. The experimental bases were made on the casts which were divided at randon into three groups of ten elements and included in flask by conventional technique in order to receive the following experimental treatments: Group 01: press with thermicpolymerized resin (Clássico) and polymerized with hot water bath at 74+2°C during 9 hours (conventional method). Group 02: press with thermic-polymerized resin (Clássico) and polymerized with dry heat (oven) at 74+2°C during 9 hours. Group 03: press with thermicpolymerized resin (Acron MC) and polymerized in microwave oven at 900 W during 3 minutes. Afterly the bases in clean and tlnished resin were atlxed on their casts with instantaneous adhesive. The plaster model-prosthesis bases set was positioned and atlxed on an especitlc instrument to obtain the sections. Guided by instruments on tlxation grip, with the aid of a manual saw, three saggital Plane cuts were made on the corresponding region to the right crest of ridge (A) and left (C) and on the palatal median region (8) and 3 Lateral Plane cuts corresponding to the distal of right and left canines (A), right and left tlrst molars mesial (8) and pos-dam region (C). The occurred dimensional alteration on the acrylic resm was evaluated with a comparator microscope in 5 referential points to each kind of cut. The numerical results were submited to a statistical analysis and the averages by the Tukey Test to a significance levei of 5%. AlI the evaluated techniques caused distortions, without statistical significative difference. There wasn't any statistical significative difference on the sagittal Plane and Lateral Plane cuts among the three studied polymerization techniques. When the disadjustement was analysed within the same techniques, it was verified that in Group 01 (thermicpolymerizer) there was no statistical significative difference among the Lateral Plane cuts. However, in group 02 (Oven), the cut A was similar to B and B to C and in group 03 (Microwaves) the datas showed the same statistical conduct between cuts B and C, but different from cut A, which showed the best adaptation . On the other hand, when the sagittal Plane cuts were analys~d, there was a similar statistical conduct among them on the three studied polymerization techniques. In this case, the cut B was statisticalIy different from cuts A' and C, showing the biggest disadjustmentMestradoProteseMestre em Clínica Odontológic
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Influencia de tecnicas de polimerização sobre adaptação das bases de protese total
2017Co-Authors: Maria Helena Waack De AlmeidaAbstract:Resumo: O objetivo desta pesquisa foi verificar as alterações de adaptação das bases de prótese total, confeccionadas com resina acrílica ativada termicamente, ocorridas sob a influência de 3 técnicasde polimerização: convencional, por calor seco e por energia de microondas. Foram confeccionados 30 modelos padrões em gesso pedra, a partir de um molde de borracha representando uma arcada superior desdentada normal. Sobre os modelos foram confeccionadas as bases de prova, que foram divididas aleatoriamente em 3 grupos de 10 elementos e incluídos. em mufla pela técnica convencional, a fim de receber os seguintes tratamentos experimentais: Grupo 01: prensagem com resina termopolimerizável (Clássico) e polimerização em banho de água aquecida a 74+2°C por 9 horas (método convencional). Grupo 02: prensagem com resina termopolimerizável (Clássico) e polimerização por calor seco (estufa) a 74+2°C por- 9 horas. Grupo 03: prensa$em com resina termopolimerizável (Acron MC) e polimerização em forno de microondas a 900 W por 3 minutos. A seguir, as bases em resina, limpas e acabadas, foram fixadas em seus respectivos modelos com adesivo instantâneo (Super Bonder). O conjunto base de prótesemodelo de gesso foi posicionado e fixado em um aparelho específico para obtenção das secções. Orientados por .guias existentes na mesa de fixação, com auxílio de serra manual, foram executados 3 cortes látero laterais passando pela região correspondentes à distal de caninos direito e esquerdo (A), mesial de primeiros molares direito e esquerdo (B) e região "pos-dam" (C) e 3 cortes ântero-posteriores passando pela região correspondente à crista do rebordo direito (A) e esquerdo (C) e região mediana do palato (B). A alteração dimensional ocorrida na resina acrílica foi avaliada por meio de um microscópio comparador, em 5 pontos referenciais para cada tipo de corte. Os resultados numéricos obtidos foram submetidos à análise estatística e as médias ao Teste de Tukey ao nível de significância de 5%. Todas as técnicas avaliadas produziram distorções, sem diferença estatisticamente significante. Quando o desajuste foi analisado dentro de uma mesma técnica, verificou-se que no Grupo 01 (Termopolimerizadora) não houve diferença estatisticamente significante entre os cortes látero-laterais. Entretanto, no Grupo 02 (Estufa), o corte A foi semelhante ao B e o B ao C, enquanto no Grupo 03 (Microondas), os dadosdemonstraram o mesmo comportamento estatístico entre os cortes B e C, porém diferentes do A, que mostrou a melhor adaptação. Por outro lado, quando os cortes ântero-posteriores foram analisados, houve comportamento estatístico semelhante entre eles nas 3 técnicas de polimerização estudadas. Neste caso, o corte B foi diferente estatisticamente dos cortes A e C, mostrando o maior desajuste. Independente da técnica de polimerização e da localização dos cortes; não houve diferença estatística quando se comparou os índices de desajuste entre os cortes látero-Iaterais e ântero-posterioresAbstract: The purpose of this study was to veri1)1 the denture bases accuracy, made with heat-cured acrylic resin, occurred under the influence of three cycles of polymerization: conventional, by dry heat and with microwave. energy. Thirty master cast were made in stone plaster from a rubber cast, representing a normal nondental arch. The experimental bases were made on the casts which were divided at randon into three groups of ten elements and included in flask by conventional technique in order to receive the following experimental treatments: Group 01: press with thermicpolymerized resin (Clássico) and polymerized with hot water bath at 74+2°C during 9 hours (conventional method). Group 02: press with thermic-polymerized resin (Clássico) and polymerized with dry heat (oven) at 74+2°C during 9 hours. Group 03: press with thermicpolymerized resin (Acron MC) and polymerized in microwave oven at 900 W during 3 minutes. Afterly the bases in clean and tlnished resin were atlxed on their casts with instantaneous adhesive. The plaster model-prosthesis bases set was positioned and atlxed on an especitlc instrument to obtain the sections. Guided by instruments on tlxation grip, with the aid of a manual saw, three saggital Plane cuts were made on the corresponding region to the right crest of ridge (A) and left (C) and on the palatal median region (8) and 3 Lateral Plane cuts corresponding to the distal of right and left canines (A), right and left tlrst molars mesial (8) and pos-dam region (C). The occurred dimensional alteration on the acrylic resm was evaluated with a comparator microscope in 5 referential points to each kind of cut. The numerical results were submited to a statistical analysis and the averages by the Tukey Test to a significance levei of 5%. AlI the evaluated techniques caused distortions, without statistical significative difference. There wasn't any statistical significative difference on the sagittal Plane and Lateral Plane cuts among the three studied polymerization techniques. When the disadjustement was analysed within the same techniques, it was verified that in Group 01 (thermicpolymerizer) there was no statistical significative difference among the Lateral Plane cuts. However, in group 02 (Oven), the cut A was similar to B and B to C and in group 03 (Microwaves) the datas showed the same statistical conduct between cuts B and C, but different from cut A, which showed the best adaptation . On the other hand, when the sagittal Plane cuts were analys~d, there was a similar statistical conduct among them on the three studied polymerization techniques. In this case, the cut B was statisticalIy different from cuts A' and C, showing the biggest disadjustmen
Jun Kwan - One of the best experts on this subject based on the ideXlab platform.
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:Background— This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). Methods and Results— Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aα; posterior, Pα) were measured. In ICM-MR, Aα measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39±5°, 34±6°, and 27±5°, respectively; P<0.01), whereas Pα showed no significant difference in any of the 3 AP Planes (61±7°, 57±7°, and 56±7°, ...
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:BACKGROUND: This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). METHODS AND RESULTS: Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aalpha; posterior, Palpha) were measured. In ICM-MR, Aalpha measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39+/-5 degrees, 34+/-6 degrees, and 27+/-5 degrees, respectively; P 0.05). In DCM-MR, both Aalpha (38+/-8 degrees, 37+/-9 degrees, and 36+/-7 degrees, P>0.05) and Palpha (59+/-6 degrees, 58+/-5 degrees, and 57+/-6 degrees, P>0.05) revealed no significant differences in the 3 Planes. CONCLUSIONS: The pattern of MV deformation from the medial to the Lateral side was asymmetrical in ICM-MR, whereas it was symmetrical in DCM-MR. RT3DE is a helpful tool for differentiating the geometry of the mitral apparatus between these 2 different types of functional mitral regurgitation.
Marc Gillinov - One of the best experts on this subject based on the ideXlab platform.
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:Background— This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). Methods and Results— Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aα; posterior, Pα) were measured. In ICM-MR, Aα measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39±5°, 34±6°, and 27±5°, respectively; P<0.01), whereas Pα showed no significant difference in any of the 3 AP Planes (61±7°, 57±7°, and 56±7°, ...
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:BACKGROUND: This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). METHODS AND RESULTS: Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aalpha; posterior, Palpha) were measured. In ICM-MR, Aalpha measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39+/-5 degrees, 34+/-6 degrees, and 27+/-5 degrees, respectively; P 0.05). In DCM-MR, both Aalpha (38+/-8 degrees, 37+/-9 degrees, and 36+/-7 degrees, P>0.05) and Palpha (59+/-6 degrees, 58+/-5 degrees, and 57+/-6 degrees, P>0.05) revealed no significant differences in the 3 Planes. CONCLUSIONS: The pattern of MV deformation from the medial to the Lateral side was asymmetrical in ICM-MR, whereas it was symmetrical in DCM-MR. RT3DE is a helpful tool for differentiating the geometry of the mitral apparatus between these 2 different types of functional mitral regurgitation.
Takahiro Shiota - One of the best experts on this subject based on the ideXlab platform.
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:Background— This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). Methods and Results— Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aα; posterior, Pα) were measured. In ICM-MR, Aα measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39±5°, 34±6°, and 27±5°, respectively; P<0.01), whereas Pα showed no significant difference in any of the 3 AP Planes (61±7°, 57±7°, and 56±7°, ...
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geometric differences of the mitral apparatus between ischemic and dilated cardiomyopathy with significant mitral regurgitation real time three dimensional echocardiography study
Circulation, 2002Co-Authors: Jun Kwan, Takahiro Shiota, Deborah A Agler, Zoran B Popovic, Jian Xin Qin, Marc Gillinov, William J Stewart, Delos M Cosgrove, Patrick M Mccarthy, James D ThomasAbstract:BACKGROUND: This study was conducted to elucidate the geometric differences of the mitral apparatus in patients with significant mitral regurgitation caused by ischemic cardiomyopathy (ICM-MR) and by idiopathic dilated cardiomyopathy (DCM-MR) by use of real-time 3D echocardiography (RT3DE). METHODS AND RESULTS: Twenty-six patients with ICM-MR caused by posterior infarction, 18 patients with DCM-MR, and 8 control subjects were studied. With the 3D software, commissure-commissure Plane and 3 perpendicular anteroposterior (AP) Planes were generated for imaging the medial, central, and Lateral sides of the mitral valve (MV) during mid systole. In 3 AP Planes, the angles between the annular Plane and each leaflet (anterior, Aalpha; posterior, Palpha) were measured. In ICM-MR, Aalpha measured in the medial and central Planes was significantly larger than that in the Lateral Plane (39+/-5 degrees, 34+/-6 degrees, and 27+/-5 degrees, respectively; P 0.05). In DCM-MR, both Aalpha (38+/-8 degrees, 37+/-9 degrees, and 36+/-7 degrees, P>0.05) and Palpha (59+/-6 degrees, 58+/-5 degrees, and 57+/-6 degrees, P>0.05) revealed no significant differences in the 3 Planes. CONCLUSIONS: The pattern of MV deformation from the medial to the Lateral side was asymmetrical in ICM-MR, whereas it was symmetrical in DCM-MR. RT3DE is a helpful tool for differentiating the geometry of the mitral apparatus between these 2 different types of functional mitral regurgitation.
