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Methemoglobinemia masquerading as pulmonary hypertension

Department of Cardiothoracic Surgery, The Royal Hospital, P.O. Box 1331, PC 111, Seeb, Oman

^* Corresponding author. Tel.: +968-504367; fax: +968-591027
rgm{at}rediffmail.com
rajgmenon{at}hotmail.com

Pulmonary arterial hypertension is known to occur postoperatively after closure of VSD. It results in a low cardiac output state with need for ventilation and frequent bagging. Methemoglobinemia, a condition associated with toxic ingestions, has been described in this setting. Methemoglobinemia is known to cause cyanosis and hypotension. We report a critically ill infant with significant methemoglobinemia after VSD closure.

Key Words: Methemoglobin; Cardiac surgery; Pulmonary hypertension