Abstract 14346: Correlation of Corevalve Device Implantation ‘Cover Index’ With One Month Aortic Regurgitation
Introduction: Aortic regurgitation (AR) after transcatheter aortic valve implantation (TAVI) has been demonstrated to be related with haemodynamic deterioration and left ventricle remodeling, leading to impaired long-term prognosis. ‘Cover index’ has been proposed to appraise the congruence between the aortic annulus and the device, correlating with AR after device deployment.
Hypothesis: Hypothesis of the study was that the annulus-prosthesis-size mismatch, as expressed through ‘cover index’, is correlated with one month AR after implantation of a self-expandable aortic prosthesis.
Methods: From June 2008 until June 2014, patients who had undergone TAVI with the CoreValve device, were retrospectively studied. The ‘cover index’ was evaluated, as previously shown, as a ratio of: 100 X ([prosthesis diameter - annulus diameter]/prosthesis diameter). The aortic valve regurgitation was echocardiographically evaluated early after the device employment and at 30 days after TAVI and classified as none, mild and moderate.
Results: A total of 133 patients (mean age 80.5±5.4 yrs, 72 males) were finally enrolled. The implantation was performed either transfemoraly, or through subclavian route (15 patients). Immediately after the implantation, no statistically significant difference was detected, regarding the evaluated ‘cover index’, between the assessed AR classifications. However, a statistically significant difference was found for the ‘cover index’ between the three one month post-TAVI aortic regurgitation classifications (18.7±4.2 for none AR, 17.2±5mm for mild and 15.2±3.9mm for moderate AR, p=0.037 between groups), indicating increased AR for lower ‘cover index’.
Conclusions: The congruence between the aortic annulus and the device, as expressed with ‘cover index’, is strongly correlated with the mid-term one month AR after CoreValve implantation. These data reinforce the importance of appropriate pre-procedural aortic valve sizing and the dynamic component of the self-expandable valves during the early post implantation period.
Author Disclosures: M. Vavuranakis: None. K. Kalogeras: None. A. Kolokathis: None. M. Lavda: None. D. Vrachatis: None. M. Kariori: None. E. Bei: None. S. Vaina: None. G. Siasos: None. E. Oikonomou: None. D. Tousoulis: None.
- © 2015 by American Heart Association, Inc.