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Hypertension after renal transplantation in children
Insights
Hypertension in pediatric kidney transplant recipients can indicate serious complications like renal artery stenosis (RAS) or rejection. Early diagnosis via angiography and PRA testing is crucial for successful allograft outcomes.
Area of Science:
- Nephrology
- Pediatric Nephrology
- Transplant Surgery
Background:
- Hypertension is a common complication following pediatric renal transplantation.
- Persistent or de novo hypertension may signal underlying graft issues.
Purpose of the Study:
- To investigate the causes and implications of post-transplant hypertension in pediatric renal allograft recipients.
- To evaluate the diagnostic utility of renal angiography and panel reactive antibody (PRA) testing.
Main Methods:
- Retrospective analysis of 77 pediatric renal allograft recipients.
- Monitoring for hypertension, panel reactive antibody (PRA) levels, and renal angiographic findings.
- Correlation of clinical findings with allograft function and patient outcomes.
Main Results:
- Seven of 77 recipients developed persistent or de novo hypertension.
- Renal artery stenosis (RAS) was identified in four patients, with successful repair improving function.
- Other patients exhibited intrarenal vascular/parenchymal lesions, potentially linked to subclinical rejection.
- Treatment of hypertension in these cases stabilized allograft function.
Conclusions:
- Hypertension post-pediatric renal transplant warrants thorough investigation for RAS or rejection.
- Renal angiography and PRA testing are recommended for diagnosing hypertension causes.
- Timely intervention for RAS can restore allograft function and normalize blood pressure.
Abstract:
Hypertension persisted for longer than 6 mo or developed de novo after the first month following transplantation in seven of 77 pediatric recipients of renal allografts; concomitantly there were an elevation of PRA and renal angiographic abnormalities. In two of the four patients who developed RAS there was evidence of diminished allograft function. Successful correction of the stenotic lesion in these two recipients resulted in a return of the blood pressure, PRA, and biochemical function of the allograft to normal. Unsuccessful attempts at surgical repair led to loss of the allograft in the other two patients with RAS. Intrarenal vascular and/or parenchymal lesions were evident in the other three recipients with hypertension. Although an explanation was not apparent, subclinical rejection was hypothesized. Treatment effected reduction of the hypertension in these three patients and no deterioration of allograft function was observed for periods of 5, 34, and 38 mo, respectively. Renal angiographic studies and determinations of PRA are recommended in any pediatric recipient of an allograft who develops hypertension after the first month following transplantation or has hypertension which persists for longer than 6 mo after transplantation.