This proposal delineates a research plan to collect blood from the patients undergoing heart catheterization or have had a heart catheterization within one year, coming in for outpatient appointments, or have scheduled cardiac CT scans at the Cleveland Clinic over a five-year period for the purpose of establishing a gene bank registry. The University of North Carolina at Chapel Hill will enroll 1,000 non-Caucasian patients. MetroHealth Medical center in Cleveland will enroll 1,000 non-Caucasian patients. The blood collected will be processed to create a repository of DNA, lymphoblastoid cell line immortalization on selected patient populations, plasma and serum. The DNA will be amplified in certain patient populations to preserve the quantity. Along with a sample of blood collected from individual patients, a concise general medical history, demographic data, electrocardiographic data, echocardiographic data (available for about 55% of patients at the present time), and laboratory data will be collected. A short interview will take place after enrollment during the outpatient visit or hospital stay, or may be conducted via phone call after enrollment. All the clinical data gathered will be compiled in GATC heart center database, and would be stored in a format where a culmination of clinical findings, i.e. representing a disease of interest, can be used to search the database to identify the blood samples of all patients with such characteristics for further study.