This study investigates the effect of renal ischemia on systolic blood pressure and renal function in dogs. The researchers used a special clamp to induce ischemia in the main renal arteries, leading to persistent elevation of systolic blood pressure. The study found that constriction of both main renal arteries resulted in a significant and lasting increase in blood pressure, which was accompanied by changes in renal function, including reduced urea clearance. However, in some cases, the elevation of blood pressure was not accompanied by significant renal dysfunction, suggesting that the ischemia may be an initial factor in the development of hypertension associated with nephrosclerosis. The study also examined the effects of renal ischemia on other organs and found that the elevation of blood pressure was not due to compression of the carotid loop during measurements. The results indicate that localized kidney ischemia can lead to persistent hypertension, and that the development of hypertension may be related to changes in renal function and vascular disease. The study concludes that renal ischemia is a sufficient condition for the production of persistently elevated systolic blood pressure in dogs, and that the findings may contribute to the understanding of hypertension associated with renal vascular disease.This study investigates the effect of renal ischemia on systolic blood pressure and renal function in dogs. The researchers used a special clamp to induce ischemia in the main renal arteries, leading to persistent elevation of systolic blood pressure. The study found that constriction of both main renal arteries resulted in a significant and lasting increase in blood pressure, which was accompanied by changes in renal function, including reduced urea clearance. However, in some cases, the elevation of blood pressure was not accompanied by significant renal dysfunction, suggesting that the ischemia may be an initial factor in the development of hypertension associated with nephrosclerosis. The study also examined the effects of renal ischemia on other organs and found that the elevation of blood pressure was not due to compression of the carotid loop during measurements. The results indicate that localized kidney ischemia can lead to persistent hypertension, and that the development of hypertension may be related to changes in renal function and vascular disease. The study concludes that renal ischemia is a sufficient condition for the production of persistently elevated systolic blood pressure in dogs, and that the findings may contribute to the understanding of hypertension associated with renal vascular disease.