Transcatheter aortic valve implantation: role of multi-detector row computed tomography to evaluate prosthesis positioning and deployment in relation to valve function

Eur Heart J. 2010 May;31(9):1114-23. doi: 10.1093/eurheartj/ehq018. Epub 2010 Feb 19.


Aims: Aortic regurgitation after transcatheter aortic valve implantation (TAVI) is one of the most frequent complications. However, the underlying mechanisms of this complication remain unclear. The present evaluation studied the anatomic and morphological features of the aortic valve annulus that may predict aortic regurgitation after TAVI.

Methods and results: In 53 patients with severe aortic stenosis undergoing TAVI, multi-detector row computed tomography (MDCT) assessment of the aortic valve apparatus was performed. For aortic valve annulus sizing, two orthogonal diameters were measured (coronal and sagittal). In addition, the extent of valve calcifications was quantified. At 1-month follow-up after procedure, MDCT was repeated to evaluate and correlate the prosthesis deployment to the presence of aortic regurgitation. Successful procedure was achieved in 48 (91%) patients. At baseline, MDCT demonstrated an ellipsoid shape of the aortic valve annulus with significantly larger coronal diameter when compared with sagittal diameter (25.1 +/- 2.4 vs. 22.9 +/- 2.0 mm, P < 0.001). At follow-up, MDCT showed a non-circular deployment of the prosthesis in six (14%) patients. Moderate post-procedural aortic regurgitation was observed in five (11%) patients. These patients showed significantly larger aortic valve annulus (27.3 +/- 1.6 vs. 24.8 +/- 2.4 mm, P = 0.007) and more calcified native valves (4174 +/- 1604 vs. 2444 +/- 1237 HU, P = 0.005) at baseline and less favourable deployment of the prosthesis after TAVI.

Conclusion: Multi-detector row computed tomography enables an accurate sizing of the aortic valve annulus and constitutes a valuable imaging tool to evaluate prosthesis location and deployment after TAVI. In addition, MDCT helps to understand the underlying mechanisms of post-procedural aortic regurgitation.

Publication types

  • Evaluation Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Angioplasty, Balloon / methods
  • Aortic Valve / pathology*
  • Aortic Valve Insufficiency / diagnostic imaging*
  • Aortic Valve Insufficiency / etiology
  • Aortic Valve Insufficiency / pathology
  • Aortic Valve Stenosis / surgery*
  • Echocardiography
  • Female
  • Heart Valve Prosthesis Implantation / adverse effects*
  • Heart Valve Prosthesis Implantation / methods
  • Heart Valve Prosthesis*
  • Humans
  • Male
  • Postoperative Complications / diagnostic imaging
  • Postoperative Complications / etiology
  • Tomography, X-Ray Computed / methods*