1. Introduction
Human hydatid disease (HD) is a parasitic infection disease, occurs
mainly as a result of infection with the larvae ofEchinococcus granulosus .
Dogs are main primary hosts and sheep
are intermediate hosts, thus, HD can be more common seen in persons
living in areas where animal husbandry is practiced. The most commonly
involved site of hydatid cysts (HC) is the liver, while cardiac
echinococcosis is an uncommon disease1. A considerable
proportion of the HD patients can stay asymptomatic, until the
space-occupying effect in the involved organ brings out
symptoms2. However, not similar with other organ
involved, patients with cardiac HC usually appear symptomatic, though
the exact proportion remains unknown3,4. Chest pain,
dyspnea, syncope and palpitations are common symptoms in patients with
cardiac HC, while patients can also show infection-associated symptoms
such as cough and fever1,5. Among all cases of cardiac
HC, the interventricular septum (IVS) is the site rarely
involved1,2,5. Here, we reported a case of old woman
who suffered a cardiac HC located in the IVS.