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• W2285991298 abstract "Accurate aortic valve annulus sizing has critical importance for the planning of percutaneous transcatheter aortic valve implantation (TAVI) in patients with severe aortic valve stenosis. Although there is a recommendation to perform the measurement during systole, little is known about the importance of the differences between systolic and diastolic dimensions of the annulus. Consecutive patients referred for TAVI were evaluated with computed tomography for valve annulus sizing during systole and diastole. Area, circumference, minimum and maximum diameters, and their mean derived diameters were obtained in both phases of the cardiac cycle. Bland-Altman plots were constructed to evaluate the differences between the measures. The analysis included 41 patients with severe aortic stenosis. Mean area, circumference, and diameters were slightly greater in systole. However, in 35% of patients, diastolic dimensions were greater. These differences, although statistically significant, were small (the greatest difference of 0.6 mm in mean diameter). Bland-Altman plots showed good agreement between systolic and diastolic measurements on all parameters evaluated. Small differences were observed in the systolic and diastolic dimensions of the aortic valve annulus with computed tomography scan, which, although statistically significant, probably do not impact the selection of prosthesis or the procedure outcome. A medida acurada do tamanho do anel valvar aórtico tem importância fundamental para o planejamento do implante percutâneo de prótese valvar aórtica transcateter (TAVI) em pacientes com estenose valvar aórtica grave. Embora haja recomendação de se realizar a medida na sístole, pouco se sabe sobre a importância das diferenças entre as dimensões sistólica e diastólica do anel. Pacientes consecutivos referidos para TAVI foram avaliados com tomografia computadorizada para medida do anel valvar na sístole e na diástole. Área, circunferência, diâmetros máximo e mínimo, e seus diâmetros médios derivados foram obtidos em ambas as fases do ciclo cardíaco. Gráficos de Bland-Altman foram construídos para se avaliarem as diferenças entre as medidas. Foram incluídos na análise 41 pacientes com estenose aórtica grave. As médias da área, circunferência e diâmetros médios foram discretamente maiores na sístole. No entanto, em 35% dos pacientes, as dimensões diastólicas foram maiores. Essas diferenças, embora estatisticamente significantes, foram pequenas (a maior diferença de 0,6 mm no diâmetro médio). Gráficos de Bland-Altman revelaram bons níveis de concordância entre as medidas sistólicas e diastólicas em todos os parâmetros avaliados. Observamos pequenas diferenças nas dimensões sistólicas e diastólicas no anel valvar aórtico à tomografia computadorizada, as quais, embora estatisticamente significantes, provavelmente não impactam na seleção da prótese e nem no resultado do procedimento." @default.
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• W2285991298 date "2015-04-01" @default.
• W2285991298 modified "2023-10-16" @default.
• W2285991298 title "Differences between systolic and diastolic dimensions of the aortic valve annulus in computed tomography angiography in patients undergoing percutaneous implantation of aortic valve prosthesis by catheter" @default.
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• W2285991298 doi "https://doi.org/10.1016/j.rbciev.2015.12.012" @default.
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