Clazosentan in Preventing the Occurrence of Cerebral Vasospasm Following an Aneurysmal Subarachnoid Hemorrhage (aSAH)

Subjects receive intravenous clazosentan at a rate of 1 mg/h starting within 56 hours maximum after aneurysm rupture and continuing until Day 14 post-aneurysm rupture

Subjects receive intravenous clazosentan at a rate of 5 mg/h starting within 56 hours maximum after aneurysm rupture and continuing until Day 14 post-aneurysm rupture

Subjects receive intravenous clazosentan at a rate of 15 mg/h starting within 56 hours maximum after aneurysm rupture and continuing until Day 14 post-aneurysm rupture

Subjects receive intravenous placebo starting within 56 hours maximum after aneurysm rupture and continuing until Day 14 post-aneurysm rupture