%0 Journal Article %T Transient Bilateral Visual Loss due to Posterior Ischemic Optic Neuropathy After Cardiac Surgery: A Very Rare Case %J Iranian Heart Journal %I Iranian Heart Association %Z %A Aghdaii, Nahid %A Ziyaeifard, Mohsen %A Hadipoorzadeh, Fatemehshima %D 2019 %\ 01/01/2019 %V 20 %N 1 %P 67-71 %! Transient Bilateral Visual Loss due to Posterior Ischemic Optic Neuropathy After Cardiac Surgery: A Very Rare Case %K Visual %K Optic neuropathy %K Cardiac Surgery %R %X Visual loss is a relatively rare but devastating and unpredictable complication of open heart surgerywith cardiopulmonary bypass. The most common cause of postoperative visual loss following cardiacsurgery is ischemic optic neuropathy (ION), which is generally categorized as anterior ischemic opticneuropathy (AION) and posterior ischemic optic neuropathy (PION). PION is clinically differentiatedfrom AION with a normal-appearing optic nerve head. PION is relatively more common in cases ofspinal surgery and radical neck dissection, while AION appears to be more common than PION aftercardiac surgery. We report a very rare case of transient bilateral visual loss due to PION in a 44-yearold man undergoing mitral valve replacement and coronary artery bypass graft surgery. %U http://journal.iha.org.ir/article_82796_743fad59ca91e63031267ab874e46303.pdf