The invention relates to the use of PDE2A inhibitors for the manufacture of a medicament for the treatment and/or prophylaxis of coronary diseases, especially stable and unstable angina pectoris, acute myocardial infarction, prophylaxis of myocardial infarction, heart failure, and high blood pressure and the sequelae of atherosclerosis, and vascular disorders, disorders of the kidney, especially renal failure, inflammatory disorders, erectile dysfunction and prevention of sudden heart death.