Background: Renal Ultra-Sound (US) and Doppler US provide measurements which reflect changes in renal and systemic haemodynamic. The renal resistive index (RRI), obtained through the Doppler spectrum analysis of renal small arteries, is altered in several pathologic conditions. Glomerulonephritis cause minor RRI changes, while renal scleroderma vasculopathy (RSV) leads to significant RRI modifications. The aim of our study was to assess RRI in IgA nephropathy (IgAN) and RSV in a retrospective observational study and to investigate determinants of the RRI in these groups of patients. Methods: We enrolled 61 IgAN patients [23 female, median age 41 (33–58) years] and 80 SSc patients [71 female, median age 52 (43–60) years]. RRI was evaluated in all patients at the time of enrolment. Laboratory tests and clinical assessment were evaluated in all patients. Results: IgAN patients showed lower RRI values than RSV patients [0.70 (0.65–0.73) vs 0.66 (0.62–0.72), p < 0.01], while no significant difference in longitudinal length was observed. Median age was significantly lower in IgAN patients than in RSV patients [41 (33–58) vs 52 (43–60), p < 0.05] while IgAN patients showed a higher prevalence of high blood pressure than RSV patients (39.3% vs 13.8%, p < 0.01). The multiple regression analysis, weighted for age, showed that RRI inversely correlates with estimated glomerular filtration rate (β coefficient = −0.524, p < 0.0001). Conclusion: Higher RRI were found in RSV patients than IgAN patients. IgAN is characterized mainly by glomerular injury, not leading to major RRI changes. © 2020 Elsevier Inc.
Renal resistive index in IgA nephropathy and renal scleroderma vasculopathy / Cianci, Rosario; Gigante, Antonietta; Bagordo, Domenico; Pintus, Giovanni; Giovannetti, Antonello; Silvia Lai, 1; Mazzaferro, Sandro; Rosato, Edoardo. - In: MICROVASCULAR RESEARCH. - ISSN 0026-2862. - 133:(2020). [10.1016/j.mvr.2020.104095]
Renal resistive index in IgA nephropathy and renal scleroderma vasculopathy
Cianci Rosario;Antonietta Gigante;Domenico Bagordo;Giovanni Pintus;Antonello Giovannetti;Silvia Lai 1;Sandro Mazzaferro;Edoardo Rosato
2020
Abstract
Background: Renal Ultra-Sound (US) and Doppler US provide measurements which reflect changes in renal and systemic haemodynamic. The renal resistive index (RRI), obtained through the Doppler spectrum analysis of renal small arteries, is altered in several pathologic conditions. Glomerulonephritis cause minor RRI changes, while renal scleroderma vasculopathy (RSV) leads to significant RRI modifications. The aim of our study was to assess RRI in IgA nephropathy (IgAN) and RSV in a retrospective observational study and to investigate determinants of the RRI in these groups of patients. Methods: We enrolled 61 IgAN patients [23 female, median age 41 (33–58) years] and 80 SSc patients [71 female, median age 52 (43–60) years]. RRI was evaluated in all patients at the time of enrolment. Laboratory tests and clinical assessment were evaluated in all patients. Results: IgAN patients showed lower RRI values than RSV patients [0.70 (0.65–0.73) vs 0.66 (0.62–0.72), p < 0.01], while no significant difference in longitudinal length was observed. Median age was significantly lower in IgAN patients than in RSV patients [41 (33–58) vs 52 (43–60), p < 0.05] while IgAN patients showed a higher prevalence of high blood pressure than RSV patients (39.3% vs 13.8%, p < 0.01). The multiple regression analysis, weighted for age, showed that RRI inversely correlates with estimated glomerular filtration rate (β coefficient = −0.524, p < 0.0001). Conclusion: Higher RRI were found in RSV patients than IgAN patients. IgAN is characterized mainly by glomerular injury, not leading to major RRI changes. © 2020 Elsevier Inc.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.