Carbostyril derivatives and salts thereof and anti-arrhythmic agents containing the carbostyril derivatives

摘要

Carbostyril derivatives or salt thereof, including novel compounds, having activities for curing and/or improving arrhythmia. Some carbostyril derivatives having similar chemical structural formula to those of carbostyril derivatives of the present invention are known in the prior art references, however, above-mentioned pharmacological activities have not been known yet.