NT-proBNP correlated with right ventricular ( RV ) dilatation ( r = 0.271 , p < 0.001 ) and RV systolic dysfunction ( r = -0.195 , p = 0.022 ) , but more strongly with LV systolic dysfunction ( r = -0.367 , p < 0.001 ) , which was present in 69 patients ( 39 % ) .