A 62-year-old man presented with a 2-month history of right occipito-parietal headache and worsening ipsilateral ptosis. CT scan and cerebral angiography revealed a large fusiform aneurysm of the P2 segment of the right posterior cerebral artery (PCA). The aneurysm was successfully trapped and subsequently excised via sub temporal approach leaving no additional neurological deficits to our patient.
CT angiography (CTA) is a fast examination performed with a time-optimised contrast injection to enhance the cerebral arteries. Being a new imaging modality in our hospital, evaluation of the effectiveness of 64-row multislice CTA in detecting intracranial aneurysms in ruptured subarachnoid haemorrhage (SAH) cases is necessary. We conducted a descriptive prospective study by recruiting 30 consecutively operated SAH cases from May 2005 until November 2006. CTA findings were studied by radiologist and neurosurgeon and these were compared with operative findings. The sensitivity and specificity of CTA were 94.4% and 97.2% respectively. Approximately half of the patients were scanned within four hours and operated within 24 hours. In conclusion, CTA proves to be highly sensitive and specific in the diagnosis of intracranial aneurysms in our study.
KEY WORDS: Subarachnoid haemorrhage, Intracranial aneurysm, Computed tomography (CT), CT angiography (CTA), Sarawak
A 10-year-old girl with mild aortic regurgitation presented with cerebral infarction. Two-dimensional echocardiography showed vegetations on the septal wall of the left ventricular outflow tract without involvement of the aortic valve itself. After successful antibiotic treatment the patient developed an intra-cranial haemorrhage due to rupture of a large intracranial mycotic aneurysm. Consent for surgical treatment of the mycotic aneurysm was not obtained. Twelve months later repeat angiography showed that the aneurysm had undergone spontaneous obliteration.
A retrospective prospective study of 84 cases of subarachnoid haemorrhage, 24 intracranial aneurysms and 18 arteriovenous malformations (AVM's) treated in the University Hospital, Kuala Lumpur, during the post CT-scan era was carried out to verify the relative frequencies of these clinical entities in the Malaysian population. Our results show that aneurysms are commoner than arteriovenous malformations as a cause of subarachnoid haemorrhage and also the most frequent as a whole, thus refuting the previous claims that AVM's are 4 to 10 times more common than aneurysms in this part of the world. Of interest was the internal carotid artery aneurysms accounted for half of the anterior circulation aneurysms and that 2/3 of the AVM's presented with intracranial haemorrhage.
The aim of this study was to compare conventional two-dimensional (2D) digital subtraction angiography (DSA) with three-dimensional (3D) rotational DSA in the investigation of intracranial aneurysm in terms of detection, size measurement, neck diameter, neck delineation, and relationship with surrounding vessels. A further aim was to compare radiation dose, contrast volume, and procedural time between the two protocols.