This observational study looks at Carotid Stenosis in two groups of subjects using a non-invasive procedure, B-mode ultrasound.

One group of subjects has had long-term intensive lipid altering therapy (lowering LDL-C plus raising HDL-C). The second group of patients has been on conventional "standard of care" treatment for carotid stenosis.

The study will look at the Carotid Intima-media Thickness (CMIT) in both groups.

Hypothesis: CIMT will differ between the two groups, such that the CIMT will be less in the subjects on intensive lipid altering therapy.

Inclusion Criteria:

• Intensive Lipid-lowering Therapy Group: Subjects currently enrolled in the Familial Atherosclerosis Treatment Observational Study.
• Usual Care Group: Subjects who were in the FATS OS Study in the past, but have since quit the study and opted for conventional "standard of treatment".

Exclusion Criteria:

• No past or present participation in the FATS OS Study.

Subjects known to have Atheroscloerosis.