Renal parenchymal blood flow can be divided in cortical and medullary blood flow. Changes and factors affecting renal medullary blood flow have not been studied in detail previously as investigators/doctors did not have tools to monitor renal medullary blood flow in vivo. Since Trueta first described renal medullary blood flow, multiple attempts have been made to study renal medullary blood flow using invasive methods. Recently renal medullary blood flow measurement using contrast US has emerged as a promising technique that investigators can use to study renal medullary blood flow in vivo. In this study investigators are aiming to study changes in renal parenchymal (cortical and medullary) blood flow with exercise in healthy subject.
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Change in renal blood flow in exercise as assessed by CEUS
Timeframe: Before and immediately after exercise