4-Mercaptobenzoylguanidines of the formula I ##STR1## in which A, R.sub.1, R.sub.2 and R.sub.3 have the meanings given, and the physiologically unobjectionable salts thereof exhibit antiarrhythmic properties and are active as inhibitors of the cellular Na.sup.+ /H.sup.+ antiporter.
公式I中的4-Mercaptobenzoylguanidines,其中A,R.sub.1,R.sub.2和R.sub.3具有给定的含义,其生理上无异议的盐具有抗心律失常作用,并作为细胞Na.sup.+ / H.sup.+抗转运体的
抑制剂具有活性。