ACE and congestive heart failure: Many of the studies tested the effect and the efficacy of ACE inhibitors (captopril, enalapril, quinapril, ramipril, and benazepril), and over these ten years, they were introduced in the standard therapy of chronic CHF in dogs affected by MMVD [145,146,147,148,149,150,151,152,153,154,155,156].