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Original article

Vol. 145 No. 5152 (2015)

Early safety outcome following transcatheter aortic valve implantation: is the amount of contrast media used a matter of concern?

  • Jan Vontobel
  • Mathias Possner
  • Philipp Schütz
  • Beat Müller
  • Maurizio Taramasso
  • Roland K Binder
  • Sabine Haueis
  • Adrian Attinger-Toller
  • Francesco Maisano
  • Fabian Nietlispach
DOI
https://doi.org/10.4414/smw.2015.14238
Cite this as:
Swiss Med Wkly. 2015;145:w14238
Published
13.12.2015

Summary

QUESTIONS UNDER STUDY: The study objective was to evaluate the impact of the amount of contrast medium used for transcatheter aortic valve implantation (TAVI) on short-term outcome. Patients undergoing TAVI are exposed to repeat contrast medium application both for preprocedural screening and during the TAVI procedure itself. Whether the amount of contrast media is associated with worse outcome is unclear.

METHODS: A total of 257 patients were included (median age 82.7 years) and divided into two groups with preserved and reduced kidney function (glomerular filtration rate <60 ml/min/1.73 m2), respectively. Total volume of contrast media administered during and within 5 days prior to TAVI was analysed. A combined early safety endpoint at 30 days was evaluated.

RESULTS: The early safety endpoint was reached by 31 patients and acute kidney injury occurred in 22 patients. The median total volume of contrast media administered was 144 ml (interquartile range 81–225 ml). The amount of contrast did not independently predict the early safety endpoint in the overall population (odds ratio [OR] 0.93, 95% confidence interval [CI] 0.56 to 1.53, p = 0.774) and in subgroups with preserved and reduced kidney function. Change in creatinine was an independent strong predictor of the early safety endpoint in the overall population (OR 18.13, 95% CI 4.70 to 69.99, p <0.001), as well as in subgroups with preserved and reduced kidney function. The amount of contrast did not predict a change in creatinine within 72 hours following TAVI (r = 0.02, 95% CI –0.02 to 0.07, p = 0.368).

CONCLUSION: Decreased kidney function after TAVI influences outcome. When rather small amounts of contrast media are used for screening and the TAVI procedure itself, the amount of contrast media seems not to be an independent predictor of outcome, further suggesting that decreased kidney function after TAVI is multifactorial.

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