Information will be collected prospectively in about 3,000 patients having Optical Coherence Tomography during cardiac catheterization. Subjects will be initially enrolled at sites outside of the United States, where Optical Coherence Tomography is approved by regulatory agencies. Subjects will be followed for up to 5 years.

This project will create a prospective registry of 3,000 patients with follow-ups of up to 5 years.

The aims of the project will be:

1. identify plaque characteristics on OCT that are associated with adverse cardiac events including myocardial infarction
2. to identify characteristics of stented arteries that are associated with adverse events including restenosis and stent thrombosis

Because detailed clinical, angiographic and intravascular imaging data will be gathered from a large number of patients with clinical follow-ups, we anticipate that the registry will be a tremendous resource for additional research questions going forward.

Inclusion Criteria:

• Subjects who have had OCT imaging performed during cardiac catheterization and have provided written consent

Exclusion Criteria:

• None

Subjects who have intracoronary OCT imaging performed during cardiac catheterization are eligible for this registry. Subjects may be identified prior to or after cardiac catheterization and OCT imaging.