Carotid B-Mode Ultrasound Study to Compare Anti-Atherosclerotic Effect of Torcetrpib/Atorvastatin to Atorvastatin Alone.

Inclusion Criteria: * Diagnosis of Heterozygous Familial Hypercholesterolemia * At least 18 years of age Exclusion Criteria: * Women who are pregnant or lactating, or planning to become pregnant. * Subjects with a clinically indicated need for statin (HMG-CoA reductase inhibitor) therapy other than atorvastatin or other concomitant therapy with known lipid altering effects on LDL-C and HDL-C including fibrates and nicotinic acid (high doses) * Subjects taking any drugs known to be associated with an increased risk of myositis in combination with HMG-CoA reductase inhibitors * Subjects with any other medical condition or laboratory abnormality which could affect subject safety, preclude evaluationof response, or render unlikely that the subject would complete the study