Current cigarette smoking, smoking intensity, and smoking duration are significantly associated with ruptured IAs at presentation. However, the significantly increased risk persists after smoking cessation, and smoking cessation does not confer a reduced risk of aneurysmal subarachnoid hemorrhage beyond that of reducing the cumulative dose 1).
1)
Can A, Castro VM, Ozdemir YH, Dagen S, Yu S, Dligach D, Finan S, Gainer V, Shadick NA, Murphy S, Cai T, Savova G, Dammers R, Weiss ST, Du R. Association of intracranial aneurysm rupture with smoking duration, intensity, and cessation. Neurology. 2017 Sep 26;89(13):1408-1415. doi: 10.1212/WNL.0000000000004419. Epub 2017 Aug 30. PMID: 28855408; PMCID: PMC5649762.