Antiarrhythmic agent

摘要

PCT No. PCT/JP93/01294 Sec. 371 Date Mar. 17, 1995 Sec. 102(e) Date Mar. 17, 1995 PCT Filed Sep. 10, 1993 PCT Pub. No. WO94/06427 PCT Pub. Date Mar. 31, 1994An antiarrhythmic agent which comprises as an active ingredient a carbostyril derivative of the formula: <IMAGE> (1) wherein R1 is hydrogen atom or a lower alkyl group, and R2 is a phenyl-lower alkyl group which has optionally 1 to 3 substituents of a lower alkoxy group on the phenyl ring, or a pharmaceutically acceptable salt thereof.