If you experience chronic chest pain despite appropriate medically-prescribed therapy and are not a candidate for another procedure, talk to your doctor about potential eligibility for participating in a study to investigate a novel treatment option.

COSIRA II is a clinical study designed to evaluate the safety and effectiveness of a medical device, known as the Shockwave™ Reducer, in treating patients suffering from chronic chest pain.

The Shockwave Reducer device
The Reducer is a small, hourglass shaped tube implanted into the main vessel that collects blood once it leaves the heart muscle. The device is intended to create back pressure that increases oxygen-rich blood flow to areas of the heart not receiving normal blood flow.
You may be able to participate in the COSIRA II study if you meet these criteria:
If your doctor thinks you would be a good candidate for this study, you will be evaluated to see if you are eligible to participate. You may:
If you participate in the study, the Reducer device may be implanted in a relatively quick procedure under local anesthesia using a catheter inserted through a small needle above your shoulder. Patients are typically discharged on the same day. You will also be required to visit the study site for follow-up visits (or will be contacted by phone) at 6 months, 12 months, 2 years, 3 years, 4 years, and 5 years to assess your symptoms, quality of life, and medications.
Contact a participating site today to learn more about the COSIRA II clinical study or to be evaluated for eligibility.

| Hospital | City | Principle Investigator |
| Imperial College | London | Dr. Rasha Al-Lamee |
| Liverpool Heart and Chest Hospital | Liverpool | Dr. Joel Giblett |
| Essex Cardiothoracic Centre | Essex | Dr. Thomas Keeble |
| Dorset County Hospital | Dorchester | Dr. Fraser Witherow |
| King’s College | London | Dr. Jonathan Byrne |
| Oxford University Hospital | Oxford | Dr. Giovanni De Maria |
| Royal Brompton Hospital | London | Dr. Ranil de Silva |
| Barts/QMUL | London | Dr. Anthony Mathur |
| Royal Free London | London | Dr. Tushar Kotecha |
| Royal Bournemouth Hospital | Bournemouth | Dr. Peter O’Kane |
| Musgrove Park Hospital | Taunton | Dr. Mohammad Sahebjalal |
| Freeman Hospital | Newcastle | Dr. Billal-Reshad Bawamia |
| Kettering General Hospital | Kettering | Dr. Prashanth Raju |
| Royal Papworth Hospital | Cambridge | Dr. Stephen Hoole |
| Bristol Royal Infirmary | Bristol | Dr. Ioannis Felekos |
| St. Thomas Hospital | London | Dr. Tiffany Patterson |
| St. George’s Hospital | London | Dr. James Spratt |
| Nottingham University Hospital | Nottingham | Dr. Andrew Vanezis |
| Queen Elizabeth Hospital | Birmingham | Dr. Alex Zaphiriou |
| Glenfield Hospital | Leicester | Dr. Bhavik Modi |