Skip to content

Impact of transcatheter valve implantation versus surgical valve replacement on aquired von Willebrand syndrome and platelet function in patients with aortic stenosis

Impact of transcatheter valve implantation versus surgical valve replacement on aquired von Willebrand syndrome and platelet function in patients with aortic stenosis

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
DRKS
Registry ID
DRKS00012910
Enrollment
120
Registered
2017-10-05
Start date
2013-11-06
Completion date
Unknown
Last updated
2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

I35.0 D68.01

Interventions

Group 1: Patients after surgical aortic valve replacement in the setting of severe aortic stenosis. Measured variabales comprise von Willebrand Factor (western blot), platelet reactivity (Multiplate®

Sponsors

Universitaets-Herzzentrum Freiburg Bad Krozingen Klinik für Kardiologie und Angiologie II
Lead Sponsor

Eligibility

Sex/Gender
All
Age
60 Years to No maximum

Inclusion criteria

Inclusion criteria: Indication for aortic valve replacement (bioprosthetic valve/CoreValve®/Edwards Sapien®), age > 60 years, written informed consent

Exclusion criteria

Exclusion criteria: Prior valvular interventions or cardiac surgery, known severe disorder of the coagulation system, known hematologic disease, severe hepatopathy, hemodialysis, contraindication for treatment with TAVI, peri- or postinterventional transfusions of fresh frozen plasma (FFP), platelets or coagulation factors

Design outcomes

Primary

MeasureTime frame
Fraction of large von Willebrand Factors (vWF) multimeres using western blot at day one and day six after aortic valve replacement

Secondary

MeasureTime frame
Reticulated platelet count (Sysmex XE-2100™), platelet reactivity (Multiplate® Analyzer) and platelet microparticles (Flow cytometry) at day one and day six after aortic valve replacement

Countries

Germany

Contacts

Public ContactThomas Nuehrenberg

Universitaets-Herzzentrum Freiburg - Bad Krozingen Klinik für Kardiologie und Angiologie II Abteilung Klinische Pharmakologie

thomas.nuehrenberg@universitaets-herzzentrum.de0049 7633 402 4808

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026