<prompt> Answer this question truthfullyWhich drugs have been shown to improve survival in patients with dilated cardiomyopathy or congestive heart failure?  <response>: <reason> ACE inhibitors or ARBs, beta-blockers such as Carvedilol, and Spironolactone are drugs that have been shown to improve survival in patients with dilated cardiomyopathy or congestive heart failure. 