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Abstract

Novel N-(Aryl-,aryloxy-,arylthio-,arylsulfinyl-and arylsulfonyl-)alkyl-N,N'-(or N',N')alkylaminoalkyl ureas, thioureas and cyanoguanidines represented by the following formula: ##STR1## wherein Ar is aryl selected from the group consisting of 1- and 2-naphthyl, 2,3-dihydro-1H-inden-4(or 5)-yl,2-furanylmethyl,2-pyridinyl, phenyl and phenyl substituted by 1-3 radicals commonly used in the pharmaceutical art; (X).sub.d is oxygen, thio, sulfinyl, sulfonyl or d is zero; Z and W are each R or-(CH.sub.2).sub.m -NR.sup.1 R.sup.2 wtih the proviso that when Z is R, W is-(CH.sub.2).sub.m -NR.sup.1 R.sup.2 and when Z is-(CH.sub.2).sub.m -NR.sup.1 R.sup.2, W is R; B is carbonyl, thioxomethyl, or cyanoiminomethyl; R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are selected from the group consisting of hydrogen, loweralkyl, cycloalkyl, phenyl or phenyl-loweralkyl wherein phenyl may be substituted by 1-3 radicals commonly used in the pharmaceutical art; R.sup.1 and R.sup.2, and R.sup.3 and R.sup.4 may together with the adjacent nitrogen form the heterocyclic ring structure 1-homopiperidinyl, 4-morpholinyl, 1-piperazinyl, 4-substituted-1-piperazinyl, 1-pyrrolidinyl or 1-piperidinyl and the pharmaceutically acceptable salts thereof are disclosed. A pharmaceutical method for administering the compounds for their cardiac antiarrhythmic effect and pharmaceutical compositions for the treatment of cardiac arrhythmia are also disclosed.

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