| abstract |
(57) [Summary] [Structure] An indole derivative represented by the general formula (1) or a salt thereof, and a therapeutic agent for heart disease containing the same as an active ingredient. [Chemical 1] R 1 to R 9 represent an alkyl group, an alkenyl group or the like which may have a substituent. [Effect] The compound (1) has a positive inotropic effect on the myocardium, an antiarrhythmic effect, and a vasodilatory effect without significantly increasing the heart rate. The agent is extremely effective in treating heart failure, arrhythmia and the like. |