In 19 patients with different supraventricular tachycardias the antiar
rhythmic drug AWD-G256 was studied to investigate the effects on hemod
ynamic parameters. Over all, stroke volume, pulmonary pressure and sys
temic blood pressure were not significantly altered. The only main adv
erse effect was a transient rise of serum transaminases in two patient
s. We conclude that AWD-G256 is usually hemodynamically tolerated, but
the antiarrhythmically effective dosage is not reached yet.