Abstract Several 7a-substituted benzoylaminoalkyl-hexahydro-1H-pyrrolizines were synthesized by acylations of 7a-aminoalkyl-hexahydro-1 H-pyrrolizines. All compounds synthesized were evaluated for their antiarrhythmic activities using the chloroform-mouse method, and some of them were found to have significant antiarrhythmic activities, comparable to that of procainamide.