Background and Design.- Anaesthesia management in pheochromocytoma surgery has many potential problems. It is hard to control the hypertension crises following the releasing of catecholamines during excision of tumour. Administration of nitroglycerin, nitroprusside, phentholamine, nicardipine, labetolol and such drugs are suggested for controlling hypertension. Diltiazem is a commonly used calcium antagonist and shows its effect on the sinus node, while other calcium antagonists show their effect on atrioventriculer node. It is especially advised to use for hypertension associated with the supraventriculer tachycardia.In our case, we applied to manage the hypertension and supraventriculer tacycardia with diltiazem infusion, and it was been controlled successfully.* Anahtar Kelimeler: Anestezi, feokromasitoma, hipertansiyon, supraventriküler taşikardi, diltiazem* Key Words: Anesthesia, pheochromocytoma, hypertension, supraventriculer tacycardia, diltiazem