Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Four different comorbidity indices for alcohol septal ablation (ASA) and surgical septal myectomy (SM) patients. For each index, ASA patients were at significantly elevated risk as compared with SM patients. HHS indicates Health and Human Service; and STS, Society of Thoracic Surgeons.
