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Arteriolosclerosis is an important vascular change induced by hypertension. Blood flow of kidney and perforating artery area in the brain in essential hypertensive patients are determined by the severity of arteriolosclerosis in each region. The aim of the study was to evaluate relation of effective renal plasma flow (ERPF) and regional cerebral blood flow (rCBF) including basal ganglia as perforating artery region in essential hypertension using renography and brain SPECT imaging. The study subjects were 28 essential hypertensive patients (56.2 6 10.5 years, M/F 5 16/12). ERPF was determined by dynamic renal scintigraphy by clearance method using Tc-mercapto acetyl triglycine. The rCBF was quantitatively measured by N-isopropyl-p-[I]iodoamphetamine autoradiography method. Regions of interest on rCBF images were set in the frontal, temporal, parietal, occipital cortex, the basal ganglia and the cerebellum. The rCBF in the frontal, temporal, parietal, occipital cortexes and the cerebellum were not correlated to ERPE However, the rCBF in the basal ganglia is significantly correlated to ERPF (r 5 0.38, p , 0.05). We conclude that hypertensive arteriolosclerosis at the kidney and at perforating artery region in the brain develops in parallel.

Relation of renal blood flow and cerebral blood flow at perforating artery region in essential hypertension