NPPB and heart failure: For heart failure patients, AM did not reduce BNP levels (SMD -0.08, − 0.31 to 0.15) or mortality rate (RR 0.76, 0.32 to 1.80), but it decreased NT-proBNP (SMD -0.12, − 0.21 to − 0.03) and PRA levels (SMD 0.52, 0.30 to 0.75), increased PRC levels (SMD -0.66, − 0.8 to − 0.44).