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The authors present the case of a patient who presented acutely with aneurysmal subarachnoid hemorrhage (SAH) and a contralateral iatrogenic dural arteriovenous fistula (DAVF). Diagnostic angiography was performed, revealing a right-sided middle cerebral artery (MCA) aneurysm and a left-sided DAVF immediately adjacent to the entry of the ventriculostomy and bur hole site. A craniotomy was performed for clipping of the ruptured MCA aneurysm, and the patient subsequently underwent endovascular obliteration of the DAVF 3 days later. The authors present their treatment of an iatrogenic DAVF in a patient with an aneurysmal SAH, considerations in management options, and a literature review on the development of iatrogenic DAVFs.

413connecting the fixed points of I\ (4) If Ox and 02 are disjoint simply connected domains invariant under a loxodromic T f the corresponding arcs, as in (3), divide S into two Jordan regions, one or the other of which must contain any domain disjoint from 0\ and 0%. (5) If 0 is a simply connected domain invariant under an elliptic T t then O must contain a fixed point of T.The examples are elaborations of the ideas in L. R, Ford, Automorphic functions y 2nd éd., Chelsea, 1951, pp. 55-59.

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