Oxygenation of the Cerebrum and Cooling During Transcatheter Aortic Valve Implantation (TAVI) Procedures - Part II


Phase N/A Results N/A

Trial Description

The aim of this study is to assess the possible neuroprotective effects of cooling (targeted cooling of the brain to 33°C) during Transcatheter Aortic Valve Implantation (TAVI) procedures. From start of anesthesia, until final valve implantation, local cooling (by the RhinoChill device) will be applied to the brain. Effect of cooling on cerebral oxygenation, by cerebral oxygen saturation monitoring (NIRS ForeSight technology) during the TAVI procedure will be continuously assessed during native valve manipulation and during final valve deployment (=primary endpoint of he study). As secondary endpoints, neuropsychological testing performed before and after TAVI procedure will assess the effects of the use of cooling during the TAVI procedure. Neuron-specific enolase (NSE) and S100-beta will be analyzed during and up to 72hrs after TAVI to compare the cerebral ischemic damage between cooled and non-cooled patients. And finally, diffusion-weighted MRI of the brain will be performed 5 days before and 5-7 days after TAVI to compare the number and total amount of cerebral ischemic insults between cooled and non-cooled patients. The hypothesis behind this study is that by local cooling of the brain during manipulation of the calcified aorta and aortic valve, the brain might be protected from cerebral ischemic insults.



  • Targeted brain cooling (33°C) by RhinoChill device Device
    Intervention Desc: targeted brain cooling by Rhinochill device to 33°C tympanic temperature during TAVI procedure. After valve implantation, slow rewarming until 35.5°C
    ARM 1: Kind: Experimental
    Label: targeted brain cooling
    Description: In these 15 pts, targeted brain cooling (tympanic temperature of 33°C) will be applied during the TAVI intervention by the use of the RhinoChill device (Benechill Inc, San Diego cA)
  • Placebo - current clinical practice, no cooling Device
    ARM 1: Kind: Experimental
    Label: no use of targeted brain cooling
    Description: In these 15 pts, no cooling techniques will be applied and current clinical practice as to maintenance of normothermia will be followed during these TAVI interventions

Trial Design

  • Allocation: Randomized
  • Masking: Single Blind (Outcomes Assessor)
  • Purpose: Prevention
  • Endpoint: Safety/Efficacy Study
  • Intervention: Parallel Assignment


Type Measure Time Frame Safety Issue
Primary changes in cerebral oxygen saturation during periods of rapid ventricular pacing and valve implantation during TAVI procedure Yes
Secondary composite outcome measure : MRI of the brain before and after TAVI; NSE before and after TAVI; S100-B before and after TAVI; neuropsychological testing before and after TAVI one year Yes