Indonesia (1978) Hypertension and stroke.
Portugal (1974 SG1560) First Cerebral angiogram 1927.
Hypertension is a risk factor for cerebral vascular accident. Involvement of the visual pathway
results in homonymous field loss. 
Cerebral angiogram was first performed by the Portuguese neurosurgeon Dr. Egas Moniz 
in 1927. He was awarded a Nobel Prize for his neurosurgical research. 
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