4-Sulfonyl- or 4-sulfinylbenzoylguanidines of the formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.6 and n have the meanings indicated, and their physiologically acceptable salts exhibit antiarrhythmic properties and, act as inhibitors of the cellular Na.sup.+ /H.sup.+ antiporter.
                            化学式I中的4-磺酰基或4-亚磺酰基苯甲酰
胍,其中R.sup.1、R.sup.2、R.sup.3、R.sup.6和n具有所示含义,以及它们的生理上可接受的盐具有抗心律失常性能,并且作为细胞Na.sup.+ /H.sup.+抗转运蛋白的
抑制剂。