Overview
Angiogram-negative subarachnoid hemorrhage (SAH) refers to bleeding into the subarachnoid space without identifiable aneurysms or arteriovenous malformations on initial angiographic imaging, posing diagnostic and management challenges 2.Diagnosis
Initial non-invasive imaging (CT/MRI) confirms SAH presence 2.
Digital subtraction angiography (DSA) typically negative for vascular abnormalities 2.
Advanced imaging techniques (e.g., MRI angiography, CT angiography) may be considered to rule out subtle vascular lesions 2.Management
Conservative management often initiated due to lack of identifiable source 2.
Close clinical monitoring for neurological changes and rebleeding risk 2.
Consider repeat angiography or alternative imaging if clinical suspicion persists 2.
Specific drug treatments not detailed in provided abstracts; focus on supportive care 2.Special Populations
No specific guidance provided for pregnancy, pediatrics, elderly, or comorbidities in the given abstracts 2.Key Recommendations
Utilize advanced imaging techniques beyond initial DSA to rule out subtle vascular causes of angiogram-negative SAH (Evidence: Moderate 2).
Implement conservative management strategies with vigilant clinical monitoring for patients diagnosed with angiogram-negative SAH (Evidence: Expert opinion 2).
Consider repeat angiographic or alternative imaging studies if clinical suspicion of an underlying lesion remains high despite negative initial studies (Evidence: Expert opinion 2).References
1 Duncan JR, Glaiberman CB. Analysis of simulated angiographic procedures: part 1--capture and presentation of audio and video recordings. Journal of vascular and interventional radiology : JVIR 2006. link
2 Chui CK, Li Z, Anderson JH, Murphy K, Venbrux A, Ma X et al.. Training and pretreatment planning of interventional neuroradiology procedures--initial clinical validation. Studies in health technology and informatics 2002. link