Background: Renal congestion decreases glomerular filtration by increased renal interstitial pressure. Method: contrast-enhanced ultrasonography (CEUS) was performed before and after treatment of ultrafiltration in the case of 85-yo man with both-side heart failure. Each relative contrast intensity (RCI) in cortex and medulla was calculated by subtracting the peak contrast intensity of segmental artery from that in cortex and medulla. Time to peak (TTP) of cortex and medulla were measured. Results: Urinary volume was significantly increased by ultrafiltration. Both RCI in the cortex and medulla were increased after ultrafiltration (−12.3 to −8.04 dB; −22.8 to −15.8 dB, respectively). TTP of cortex was shorted (16 to 11 sec), but that of medulla did not changed (11 to 12 sec). Conclusion: CEUS revealed the change of renal perfusion in a case of renal congestion.
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