Editing Cardiac catheterization (section)

===Alcohol septal ablation (ASA)===
{{main|Alcohol septal ablation}}

[[Hypertrophic cardiomyopathy]] is a disease in which the myocardium is thickened and can cause blood flow obstruction. If hemodynamically significant, this excess muscle can be removed to improve blood flow. Surgically, this can be done with [[septal myectomy]]. However, it can be done through catheterization and by injecting [[ethanol]] to destroy the tissue in an [[alcohol septal ablation]]. This is done by selected an appropriate septal artery supplying the intended area and, essentially, causing a localized, controlled [[myocardial infarction]] of the area with ethanol.{{citation needed|date=March 2021}}