Patent ID: 7906521

Claim:
A method of treating cardiac arrhythmia in a mammal which comprises administering a compound selected from the group consisting of 7-methoxy-2,3-dimethyl-1-phenyl-2,3-dihydroquinazolin-4(1H)-one; 7-methoxy-2-methyl-4-oxo-1-phenyl-1,4-dihydroquinazolin-1-ium chloride; 2-tert-butyl-7-methoxy-1-phenylquinazolin-4(1H)-one; 2-cyclohexyl-7-methoxy-1-phenylquinazolin-4(1H)-one; and 3-cyclopropyl-7-methoxy-1-phenylquinazoline-2,4(1H,3H)-dione in a therapeutically effective amount.