VT-10201 is an Open-label, Phase 1b, Single-ascending Dose Study That Will Evaluate the Safety of VERVE-102 Administered to Patients With Heterozygous Familial Hypercholesterolemia (HeFH) or Premature Coronary Artery Disease (CAD) Who Require Additional Lowering of LDL-C. VERVE-102 Uses Base-editing Technology Designed to Disrupt the Expression of the PCSK9 Gene in the Liver and Lower Circulating PCSK9 and LDL-C. This Study is Designed to Determine the Safety and Pharmacodynamic Profile of VERVE-102 in This Patient Population.