CTA/CTV in Young Patients with Frontal Lobar Intracerebral Hemorrhage

High‑Risk Clinical Features that Prompt Vascular Imaging

Lobar (frontal) hemorrhage, age < 70 years, and absence of hypertension are three critical features that identify patients at high risk for an underlying macrovascular cause and therefore mandate immediate vascular imaging. 1

The 2022 American Heart Association/American Stroke Association (AHA/ASA) guideline recommends performing CTA with venous‑phase imaging (CTA/CTV) in patients with spontaneous lobar ICH who are younger than 70 years to exclude macrovascular lesions or cerebral venous thrombosis. 3
The same guideline advises that digital subtraction angiography (DSA) should be obtained in patients < 70 years with lobar ICH when clinical suspicion remains high or when non‑invasive studies are suggestive of a vascular lesion. 3

CTA/CTV identifies a macrovascular cause in approximately 17–25 % of young or non‑hypertensive lobar ICH patients. 3
Cerebral venous thrombosis accounts for about 25 % of the vascular causes detected by CTA/CTV in this population. 1

Arteriovenous malformations – the most common vascular cause in young patients. 1
Aneurysms – represent roughly one‑third of vascular etiologies. 1
Cerebral venous thrombosis – requires inclusion of a venous‑phase acquisition. 1
Dural arteriovenous fistulas – also identifiable on CTA/CTV. 1
Tumors and other structural lesions – may be revealed during the same study. 1

Compared with catheter angiography, CTA demonstrates >90 % sensitivity and specificity for detecting intracranial vascular malformations. 3
CTA provides a “spot sign” that predicts hematoma expansion, aiding early risk stratification. 1

CTA/CTV should be performed immediately after the initial non‑contrast CT while the patient remains on the scanner table to avoid diagnostic delays. 6
Early imaging prevents treatment postponement that could adversely affect management decisions. 4
Inclusion of a venous phase is essential when the hemorrhage location suggests cortical vein thrombosis, as CT venography is required for diagnosis. 1

If CTA/CTV is negative or inconclusive, DSA is recommended because it remains the gold‑standard diagnostic test. 3
DSA uncovers additional vascular pathology in about 13 % of patients whose initial CTA was negative. 3
A repeat DSA performed 3–6 months later can reveal previously occult lesions. 3

MRI/MRA/MRV achieve comparable sensitivity (≈95 % for aneurysms, >90 % for malformations) without radiation, but CTA/CTV is preferred in the acute setting due to faster acquisition, broader availability, and superior detection of acute hemorrhage. 1