The purpose of the study is to establish an overarching database of information containing historical, demographical, clinical, and intermediate and long-term outcome data from all William Beaumont Hospital (WBH) patients undergoing Cardiac Computed Tomographic Angiography (CCTA) testing for clinical or scientific reasons.

The principal goal of his project is to enable the study investigators to organize WBH research activity in the field of CCTA by concentrating data from all the patients who allow use of their data in one organized, audited and securely stored database. It will allow the ability to collect retrospective and prospective data from a number of different clinical systems and securely maintain patient medical record numbers for the reference on future projects as well as identification of patients with multiple studies and multiple follow-ups.

Inclusion Criteria:

• all retrospective patients who under went a CTA and were granted a waiver of consent
• all prospective patients CTA patients who gave informed consent.

Exclusion Criteria:

• Non CTA patients
• Patients who refused participation.

• Both genders
• Retrospective CCTA subjects who have undergone CCTA in the past 5 years at this institution
• Prospective subjects who will have a CCTA at this institution (ongoing)