Aortic annulus dimension assessment by computed tomography for transcatheter aortic valve implantation: differences between systole and diastole
| Autor: | Matthew I. Worthley, Dennis T.L. Wong, Gary Y.H. Liew, Brett Lorraine, Viji S. Thomson, M. Cunnington, James D. Richardson, Stephen G. Worthley, George Kourlis, Diana Leech, A. Bertaso |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Male
Cardiac Catheterization medicine.medical_specialty Systole Diastole Prosthesis Design Severity of Illness Index Predictive Value of Tests Internal medicine Multidetector Computed Tomography medicine Humans Radiology Nuclear Medicine and imaging Cardiac skeleton Aged Aged 80 and over Heart Valve Prosthesis Implantation medicine.diagnostic_test Cardiac cycle business.industry Patient Selection Calcinosis Reproducibility of Results Aortic Valve Stenosis medicine.disease Stenosis Aortic Valve Heart Valve Prosthesis Coronal plane Angiography cardiovascular system Ventricular pressure Cardiology Female Cardiology and Cardiovascular Medicine business |
| Zdroj: | The International Journal of Cardiovascular Imaging. 28:2091-2098 |
| ISSN: | 1573-0743 1569-5794 |
| Popis: | Accurate assessment of aortic annular dimensions is essential for successful transcatheter aortic valve implantation (TAVI). Annular dimensions are conventionally measured in mid-systole by multidetector computed tomography (MDCT), echocardiography and angiography. Significant differences in systolic and diastolic aortic annular dimensions have been demonstrated in cohorts without aortic stenosis (AS), but it is unknown whether similar dynamic variation in annular dimensions exists in patients with severe calcific AS in whom aortic compliance is likely to be substantially reduced. We investigated the variation in aortic annular dimensions between systole and diastole in patients with severe calcific AS. Patients with severe calcific AS referred for TAVI were evaluated by 128-slice MDCT. Aortic annular diameter was measured during diastole and systole in the modified coronal, modified sagittal, and basal ring planes (maximal, minimal and mean diameters). Differences between systole and diastole were analysed by paired t test. Fifty-nine patients were included in the analysis. Three of the five aortic dimensions measured increased significantly during systole. The largest change was a 0.75 mm (3.4%) mean increase in the minimal diameter of the basal ring during systole (p = 0.004). This corresponds closely to the modified sagittal view, which also increased by mean 0.42 mm (1.9%) during systole (p = 0.008). There was no significant change in the maximal diameter of the basal ring or the modified coronal view during systole (p > 0.05). There is a small magnitude but statistically significant difference in aortic annulus dimensions of patients with severe AS referred for TAVI when measured in diastole and systole. This small difference is unlikely to alter clinical decisions regarding prosthesis size or suitability for TAVI. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink