Hypertensive Hemorrhages in the Basal Ganglia

Pathophysiological Mechanism

The American College of Radiology supports the fact that hypertensive hemorrhage in the basal ganglia is the most common etiology for atraumatic intraparenchymal hemorrhage, characterized by clinical history of hypertension, single deep hemorrhage location, and absence of other structural lesions on imaging 1, 2
The distribution of hypertensive hemorrhage directly reflects the high pulse pressure of arterioles immediately downstream from major end arteries with minimal intervening branching, causing repetitive mechanical stress on arteriolar walls 1

The Journal of the American College of Radiology recommends distinguishing deep central grey and brainstem microhemorrhages as attributed to hypertensive angiopathy, while lobar microhemorrhages suggest cerebral amyloid angiopathy 2, 3
Alzheimer's and Dementia journal suggests that anatomical distinction is critical for determining etiology and guiding management of hypertensive hemorrhages 3
The American College of Radiology advises to exclude underlying structural lesions with appropriate vascular imaging, particularly in younger patients or those without hypertension history 2