Imidazolylphenyl and 1,2,4-triazolylphenyl benzopyridazinone and pyridopyridazinone compounds and their use for increasing cardiatonic contractility

摘要

This invention relates to imidazolylphenyl and 1,2,4- triazolylphenyl benzopyridazinone and pyridopyridazinone compounds of the formula ##STR1## wherein A is CH or N and not more than one of W, X, Y and Z is a N atom which possess valuable pharmaceutical preparations, e.g. , increasing cardiotonic contractility. Uses of said compounds including methods for increasing cardiac contractility and in the treatment of congestive heart failure, pharmaceutical compositions including the same and methods for the preparation thereof.