Extracorporeal Shockwave Therapy for the Treatment of Chronic Angina Pectoris

NCT ID: NCT01567592

Last Updated: 2012-04-03

Basic Information

• Recruitment Status: SUSPENDED
• Clinical Phase: PHASE1
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2009-03-31
• Study Completion Date: 2012-12-31

Brief Summary

Low intensity shockwaves have been proven in animal studies to induce local growth of new blood vessels from existing ones.

The hypothesis of this study is that shockwave therapy could improve the symptoms of patients with refractory angina not amenable to revascularization with angioplasty or bypass surgery.

Detailed Description

Low intensity shockwaves (1/10 the ones used in Lithotripsy) are delivered to myocardial ischemic tissue. Shockwaves are created by a special generator and are focused using a shockwave applicator device. The treatment is guided by standard echocardiography equipment. The shockwaves are delivered in synchronization with Patient R-wave to avoid arrhythmias. The treatment is painless.

At first, the patient undergoes stress- SPECT testing to identify the ischemic areas. Following that, the same area is localized by the ultra-sound device and the shockwaves are focused to the ischemic area. Several treatments are required for optimal results.

Conditions

Refractory Angina Pectoris

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Active Shockwave Therapy

Treatment group. Patients in this group receive actual shockwave therapy.

Group Type: EXPERIMENTAL

Cardiac Extracorporeal Shockwave Therapy generator (Cardiospec)

Intervention Type: DEVICE

Energy Density - 0.09 mJ/mm2

Interventions

Cardiac Extracorporeal Shockwave Therapy generator (Cardiospec)

Energy Density - 0.09 mJ/mm2

Intervention Type: DEVICE

Other Intervention Names

Cardiospec; ESMR therapy; Extracorporeal Shockwave Myocardial Revascularization

Eligibility Criteria

Inclusion Criteria

1. The patient will have an acoustic window to the myocardium by echocardiography. 4 chamber view (4CH), 2 chamber view (2CH), long axis (LAX) and short axis view (SAX) should be verified.

2. Patient is diagnosed with chronic angina pectoris. Diagnosis is based on medical history, complete physical evaluation, and Exercise SPECT.

3. Patient has documented myocardial reversible ischemia and or hibernation in at least one segment.

4. Patient is classified as AP CCS of III or IV.

5. Patient should be on a stable dosage of medication used to treat angina for at least 6 weeks prior to enrollment.

6. Patients demonstrates exercise tolerance time (ETT) duration < 10 minutes on a modified Bruce protocol on 2 consecutive tests (tests no less than 24 hours and no more than 2 weeks apart), with the second test within the difference of 25% of the first (Patients should not be informed of exercise restrictions required for entry into the study).

7. Patients where angioplasty and bypass are not indicated because of anatomical or procedural reasons or frequent reocclusion/restenosis following traditional revascularization.

8. Patient has refused to undergo another angioplasty or CABG.

9. Patient has signed an informed consent form.

10. Patient's condition should be stable and should have a life expectancy of > 12 months.

11. Patient's current and past medical condition and status will be assessed using previous medical history, physical evaluation, and the physicians (principle investigator's) medical opinion.

Exclusion Criteria

1. Patient has chronic lung disease based on the GOLD criteria the patient has stage IV: Very Severe COPD according to Spirometric Classification of COPD, Severity based on Post-Bronchodilator

2. Patient has emphysema and pulmonary fibrosis.

3. Patient has active endocarditis, myocarditis or pericarditis.

4. Patient is simultaneously participating in another device or drug study, or has participated in any clinical trial involving an experimental device or drug, including other drugs or devices enhancing cardiac neovascularization, or was treated with TMR (Transmyocardial revascularization) or PMR (Percutaneous revascularization) , or any ESWT machine for neovascularization of a competitor company within 3 months of entry into the study.

5. Patients who are unwilling or unable to cooperate with study procedure.

6. Patients who are unwilling to quit smoking during the study procedure (including screening phase)

7. Patients who had MI less than 3 months prior to treatment

8. Patients with moderately severe or severe valvular disease. Moderately-severe and severe disease will be echographically diagnosed as follows:

• Aortic Stenosis: Patients with Moderately-severe [Peak Aortic valve gradient (AVG): 50-60 mmHg; Mean AVG: 30-40 mmHg; Effective orifice area (EOA): 0.75-1.0 cm2] and severe Aortic Stenosis [Peak AVG: above 60 mmHg; Mean AVG: above 40 mmHg; EOA: below 0.75 cm2]
• Mitral Stenosis: Patients with severe Mitral Stenosis [EOA: below 1 cm2; Pressure half-time (ms): above 200 mmHg; Mean Mitral valve gradient: above 10 mmHg]
• Aortic Regurgitation & Mitral Regurgitation: Patients with moderately- severe and severe aortic regurgitation and mitral regurgitation will be excluded.
• Moderately-severe (grade 3, or 3/4) and severe (grade 4, or 4/4) are hemodynamically significant.
• Tricuspid Regurgitation (TR): Its severity is graded from 1-4 as for aortic and mitral regurgitation. Grades 3 and 4 will be excluded from the study. The more severe levels of TR are common in severe biventricular failure, mitral stenosis, cor pulmunale and any other cause of pulmonary hypertension.

9. Patient with intraventricular thrombus

10. Patient is pregnant

11. Patient with a malignancy in the area of treatment

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

KMH Cardiology and Diagnostic Centres

OTHER

Sponsor Role: collaborator

Medispec

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Arvi Grover, MD

Role: PRINCIPAL_INVESTIGATOR

KMH Cardiology & Diagnostic Centers

Locations

KMH Cardiology & Diagnostic Centers

Ontario, , Canada

Countries

Canada

Other Identifiers

ESMR-KMH-Canada

Identifier Type: -

Identifier Source: org_study_id