Compared with baseline , NYHA functional class remained unchanged at @ months , distance during @MWT ( @ m vs. @ m ) and LVEF ( @ % vs. @ % ) were increased , but BNP levels were reduced ( @ pg/ml vs. @ pg/ml ) in the RVMSP group compared with those in the RVAP group , especially in patients with LVEF @ % -@ % ( for all comparisons , P < @ ) .