Omission of balloon aortic valvuloplasty before implanting a balloon-expandable aortic valve shortens procedure time and lowers contrast volume, but is associated with an increase in cerebral ischaemic lesions. This finding comes from a nonrandomized, single-centre study conducted in Hamburg, Germany.
A total of 87 consecutive, high-risk patients underwent transcatheter aortic valve implantation (TAVI) with a balloon-expandable valve and either received (n = 32) or did not receive (n = 55) prior balloon valvuloplasty. Procedural success was 93.5% and 98.2% in each group, respectively. As expected, the duration of the procedure (69.2 min vs 58.7 min; P = 0.008) and the volume of contrast agent (97.0 ml vs 69.8 ml; P = 0.004) were significantly higher in patients who received balloon valvuloplasty compared with those who did not. However, diffusion-weighted MRI performed 2–7 days after TAVI revealed that patients who did not receive balloon valvuloplasty had a significantly higher volume of cerebral ischaemic lesions (235.5 mm3 vs 89.5 mm3; P = 0.01).
Whether this increased rate of cerebral ischaemic lesions translates into a higher rate of stroke remains to be established. Nevertheless, the investigators comment that “cerebral ischaemic lesions potentially deteriorate neurocognitive function and should therefore be avoided. Cerebral embolic protection devices may be of specific value for TAVI without balloon aortic valvuloplasty using a balloon-expandable valve.”
References
Bijuklic, K. et al. Increased risk of cerebral embolization after implantation of a balloon-expandable aortic valve without prior balloon valvuloplasty. JACC Cardiovasc. Interv. 10.1016/j.jcin.2015.07.013
Rights and permissions
About this article
Cite this article
Lim, G. Importance of balloon valvuloplasty before TAVI to prevent embolization. Nat Rev Cardiol 12, 683 (2015). https://doi.org/10.1038/nrcardio.2015.160
Published:
Issue Date:
DOI: https://doi.org/10.1038/nrcardio.2015.160