Cyclosporine A to Treat Hypertrophic Cardiomyopathy (HCM)
This study will examine the effectiveness of the drug cyclosporine in treating hypertrophic cardiomyopathy (HCM), a condition in which the heart muscle thickens. The thickened muscle can impair the heart's pumping action or decrease its blood supply, or both. Various symptoms, such as chest pain, shortness of breath, fatigue, and palpitations, may result. In animal studies, cyclosporine prevented heart muscle from thickening in mice that had been engineered to develop thick hearts.
Patients with HCM 18 to 75 years old are screened for this study under protocol 98-H-0102 and this protocol. Screening tests include blood tests, echocardiogram to measure heart thickness, Holter monitor to record heartbeats, treadmill exercise test, and various imaging tests including a thallium scan, radionuclide angiography, magnetic resonance imaging (MRI), and cardiac catheterization to examine heart function and blood supply.
Patients admitted to the study will be randomly assigned to take either cyclosporine tablets or a placebo (a look-alike tablet with no active ingredient) twice a day for 6 months. During a brief hospital stay at the start of the study, blood samples will be taken to measure cyclosporine levels. After discharge, heart rate and blood pressure will be checked and blood tests done during follow-up visits once a week for 2 weeks and then every two weeks until the end of the 6-month treatment period. At that time, patients will be hospitalized a second time for repeat tests to determine the effects of the drug on the heart condition. They include thallium scan, radionuclide angiogram, MRI, treadmill exercise test, cardiac catheterization, and echocardiogram. An echocardiogram and MRI will be repeated 1 year after the start of the study to evaluate long term effects of the drug, if any.
Drug: Cyclosporine A
|Study Design:||Primary Purpose: Treatment|
|Official Title:||Double Blind Placebo Controlled Study of Cyclosporin A in Patients With Left Ventricular Hypertrophy Caused by Sarcomeric Gene Mutations|
|Study Start Date:||December 1999|
|Estimated Study Completion Date:||February 2001|
Please refer to this study by its ClinicalTrials.gov identifier: NCT00001965
|United States, Maryland|
|National Heart, Lung and Blood Institute (NHLBI)|
|Bethesda, Maryland, United States, 20892|