Hypersensitivity to levosimendan or to any of the excipients.
Severe hypotension and tachycardia (see Pharmacology: Pharmacodynamics under Actions and Precautions).
Significant mechanical obstructions affecting ventricular filling or outflow or both. Severe renal impairment (creatinine clearance <30 mL/min) and severe hepatic impairment. History of Torsades de Pointes.