Cardiomyopathy in Steroid-resistant Nephrotic Syndrome: Impact of Focal Segmental Glomerulosclerosis

The objective of this study is as follows: * Perform genetic analysis to define the prevalence of each of the known gene mutations in an unselected cohort of patients with focal segmental glomerulosclerosis (FSGS) * Perform a comprehensive assessment of cardiovascular status to determine the incidence of any cardiac abnormalities in patients with FSGS * Determine if patients with mutations in specific proteins are more likely to have cardiovascular abnormalities * Initiate long-term follow up in all patients to determine whether cardiac prognosis is related to any specific genetic abnormality