Testing will be performed to determine if patients are eligible for this study. An EKG (electrical tracing of the heart) will be performed. They will be asked to complete a 6- minute hall walk test that will provide information regarding their ability to exercise and conduct daily activities. An echocardiogram with tissue Doppler imaging (ultrasound of the heart) will be performed to determine how the heart muscle contracts. Results of this echocardiogram will determine if patients are eligible to participate in this study.