Study design: single arm, interventional and multicenter study. The objectives are evaluate Safety and efficacy of TAVI in Department of Cardiology without on site cardiac Surgery for symptomatic severe aortic valve stenosis by expert operator team, in patients with prohibitive surgical risk. For the pilot phase, 20 patients will be enrolled. For whole study, all consecutive patients undergoing TAVI in center without CS on site will be enrolled to reach a number of about 200 patients.
Senile degenerative aortic valve stenosis with echocardiography derived criteria: mean gradient > 40 mmHg or jet velocity > 4.0 m/s aortic valve area (AVA) of < 0.8 cm2 (or AVA index < 0.5 cm2/m2)
Symptomatic due to aortic valve stenosis as demonstrated by NYHA Functional Class > = II
Age >= 75 years old
Patients with prohibitive risk established in the Heart Team and defined on the basis of the following clinica instrument criteria according with the Varc-2 consensus.
Tavi in case of aortic valve bioprosthesis (TAVI valve-in valve)
controindication to femoral access
Bicuspid aortic valve
Instrumental characteristics, evaluated by angioTC, associated with an increased risk of major complications: severe left ventricle outflow tract or sub annular calcification, condition associated with an increased risk of rupture of the valve ring, presence of complex aortic plaques correlated with the possibility of dissection, valvular ring-coronary ostia distance < 10 mm associated with a high probability of coronary obstruction, severe aortic root dilatation or out of range aortic annulus diameters for TAVI are not complatible for safe valve implatation.
Single group
Transfemoral transcatheter aortic valve implementation
Deviceranscatheter aortic valve implantation, a percutaneous treatment for severe aortic valve stenosis, is increasingly performed worldwide. The pacemaker should be able to perform overdrive pacing which is essential to reduce cardiac output and transvalvular blood flow which are critical during balloon aortic valvuloplasty and valve deployment of the balloon- expandable valve. Minor adjustment may be needed for ideal positioning, but importantly this has to be done before valve implantation
number of all cause death patients in 30 days following TAVI/total TAVI patients
the simple size calculation is based on the primary endpoint mortality at 30 days. Considering a standard incidence of 6-7% 200 patients will be needed to demonstrate, wuth an alpha error of 5% the non inferiority of the alternative treatment compared to the standard considering a non inferiory margin of 3% such as to exclude mortaluty values higher than 10%, in relation at the upper limit of the 90% confidence interval calculated with the exact method of clopper and Pearson.
Click on the lead sponsor to view all of their trials.
