ADRB2 and congestive heart failure: Low-dose nitrate treatment did not affect the CHF-induced changes to the levels of α1, β-AR, and ATR subtypes, whereas the other treatments significantly reduced the level of AT1R and increased the levels of α1A-AR, β1-AR, β2-AR, and AT2R. Consistent with the other findings, olmesartan had a more significant effect than high-dose nitrate treatment, but the difference was not statistically significant.