<prompt> Most common cause of subarachnoid hemorrhage is-Rupture of berry aneurysmRupture of fusiform aneurysmHead injurynone  <response>: Ans-CNote-Most common cause - trauma most common nontraumatic - a Berry aneurysm Most common cause of S AH is rupture of a secular aneurysm excluding head trauma - Harrison a Saccular aneurysm are synonymous with Berry aneurysms and most commonly occurs in the anterior circulation on the circle of Willis Between 5 and 10 of strokes are due to SAH. Although hemorrhage is usually from rupture of an aneurysm or AV malformation 893-CMDT-10 A saccular aneurysm a berry aneurysm are usually asymptomatic. They may be associated with polycystic kidney disease and co-arctation of the aorta The hallmark of aneurismal rupture is blood in the CSF Sudden headache in the absence of focal neurologic symptoms is the hallmark of aneurismal rupture, focal deficits may occur hemiparesis, aphasia, and abulia A mycotic aneurysm is an infected aneurysm resulting from either an extravascular or intravascular source of infection Resulting from direct trauma to a vessels with secondary infections most commonly occurs in femoral arteries and less commonly in the arteries of neck The putamen Basal ganglia is the most common site hypertensive haemorrhage Phenylpropanolamine PPA has been associated with hemorrhagic stroke use for weight lossResmussens aneurysm is the dilation of small and medium-sized pulmonary artery in a tuberculous cavity The aneurysm involved in massive bleeding in cavitory tuberculous lesion is Bronchial artery Most common site of peripheral aneurysms is - Popliteal artery 923- Baily Love 25th Nerve compressed by aneurysm of posterior communicating artery is - Occulomotor nerve Pseudoaneurysm in IV drug abusers is commonly found in Femoral, Brachial and radial artery The best method to monitor intracranial pressure is - Intraventricular catheter Most common location of intracranial neurocysticercosis is Brain parenchyma epileptic seizure is most common symptomsDiagnostic strategy in SAHInvestigation of choiceMost sensitive investigation to determine etiologyNon contrast CT scanDSA of four vessels both carotid both vertebral to define the anatomical details of aneurysm to determine other unruptured aneurysm existsIf scan failsLumber puncture done to establish blood in CSFHallmark Most common site of rupture of Abdominal aortic aneurysm is - Laterally into the left retroperitoneum Subdural hemorrhage - results from tearing of the superior cerebral veins at their point of entry into the superior sagittal sinus, caused by, blow on the front or back of the head Cerebral hemorrhage- caused by rupture of the thin-walled lenticulostriate artery a branch of the middle cerebral artery 