[1] He was a graduate of Robert College[2] where he first met Bülent Ecevit, future leader of the Republican People's Party (CHP).
[4] Isvan's tenure ended in December 1977 since he lost the pre-election carried out before the local elections.
[7] The reason for his arrest was his alleged role in the 1 May demonstrations organized by the DISK, a leftist confederation of trade unions.
[7] In the party İsvan was part of the left-wing faction alongside Seyfi Oktay and Cevdet Selvi.
[7] Funeral prayers for him were performed at the Teşvikiye Mosque, Istanbul, and he was buried in Taşköprü next to his wife who had died on 8 May 2013.
[10] İsvan was the author of several books including Başkent gölgesinde İstanbul (Turkish: Istanbul in the shadow of the capital) published by İletişim Publications in 2002[2] and Köprüler gelip geçmeye.