Supraventricular tachycardia.
D006801:Humans; D000077771:Methantheline; D000644:Quaternary Ammonium Compounds / Q000009:adverse effects*; D013610:Tachycardia; D013617:Tachycardia, Supraventricular
D000644:Quaternary Ammonium Compounds; D000077771:Methantheline
METHANTHELINE/injurious effects; TACHYCARDIA