Clinical Trial Update

Aortech International PLC 29 May 2002 AorTech International plc Clinical Trial Update AorTech International plc announces a delay in the commencement of the clinical trials for its new Tri-leaflet Heart Valve. AorTech commenced the regulatory and pre-clinical phase testing of its New Valve in October, 2001 and preliminary results from an element of this testing indicate performance issues that require further investigation. The extent of these issues can only be determined when all the relevant tests are completed during the course of the next four months after which further announcements will be made. Dr. Peter Duijst, AorTech's Medical Director said: - 'The regulatory testing process is continuing and we will be able to assess the impact on the commencement of our clinical trials when all relevant data has been collected and assessed'. 29 May 2002 ENQUIRIES: AorTech International plc Tel: 01698 746 699 Eddie McDaid, Chief Executive College Hill Tel: 020 7457 2020 Michael Padley Clare Warren This information is provided by RNS The company news service from the London Stock Exchange