2-aryl-3,4-diazabicyclo[4.n.0]-alk-2-en-5-ones of the formula ##STR1## where m, n, R, R.sup.1, R.sup.2 and R.sup.3 have the stated meanings, are used for the treatment of cardiac insufficiency.
式子为##STR1##的2-芳基-3,4-二
氮杂双环[4.n.0]-烯-2-烯-5-酮,其中m,n,R,R.sup.1,R.sup.2和R.sup.3具有上述含义,用于治疗心力衰竭。