MCQ: Chronic Kidney Disease (CKD) | Acute emergency

Correct Answer: B. Emergency dialysis

Explanation: Uremic Pericarditis in Advanced Chronic Kidney Disease

Uremic pericarditis is an inflammatory complication of advanced kidney failure associated with the accumulation of uremic toxins. It may occur before dialysis is initiated or in patients receiving inadequate dialysis.

Dialysis is the primary treatment for uremic pericarditis. Read the clinical review on management of patients with kidney failure and pericarditis.

In this 13-year-old boy with stage 5 chronic kidney disease (CKD), the combination of chest pain relieved by sitting forward, a pericardial friction rub, and a pericardial effusion strongly suggests acute pericarditis. In the context of advanced kidney failure, uremic pericarditis is the most likely diagnosis.

The most appropriate treatment is urgent initiation of dialysis or intensification of the existing dialysis regimen, provided uremia is considered the cause. Dialysis helps remove retained uremic solutes and often leads to improvement in pericardial inflammation and effusion.

Interpretation of the clinical findings

• Chest pain relieved by sitting forward: A characteristic feature of pericarditis.

• Pericardial friction rub: A classic clinical finding caused by inflamed pericardial surfaces rubbing against each other.

• Diffuse ST-segment elevation: Compatible with acute pericarditis, although this ECG pattern is not specific to uremic pericarditis.

• Moderate pericardial effusion: Supports pericardial involvement and requires assessment for haemodynamic compromise and close monitoring for progression to cardiac tamponade.

Why are the other options incorrect?

A. Broad-spectrum antibiotics: These are indicated when bacterial infection, including purulent pericarditis, is suspected. They do not treat uncomplicated uremic pericarditis.

C. High-dose corticosteroids: These are not routine first-line treatment for uremic pericarditis. They may increase infection risk and should be considered only in selected circumstances after specialist assessment.

D. Intravenous furosemide: This may be useful for fluid overload in selected patients with residual kidney function, but it does not correct uremia or directly treat uremic pericarditis.

E. Pericardiocentesis: This is urgently indicated when cardiac tamponade causes haemodynamic compromise. Drainage may also be necessary for a large or enlarging effusion, persistent symptoms, or an effusion that fails to improve despite adequate dialysis. A moderate effusion alone, without evidence of tamponade, does not automatically require immediate drainage.

Clinical Pearl

In a child with advanced CKD and suspected uremic pericarditis, initiate dialysis promptly or intensify the existing regimen. Monitor closely for cardiac tamponade, including hypotension, raised venous pressure, pulsus paradoxus, and concerning echocardiographic findings.

If cardiac tamponade is present, urgent pericardial drainage takes priority. Dialysis must be planned carefully in haemodynamically unstable patients because rapid fluid removal may worsen circulatory compromise.

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References

1. Rosen RJ, Valeri AM. Management of patients with kidney failure and pericarditis. Clin J Am Soc Nephrol. 2023;18(2):270–272. doi:10.2215/CJN.07470622.
2. Rehman KA, Betancor J, Xu B, Kumar A, Rivas CG, Sato K, et al. Uremic pericarditis, pericardial effusion, and constrictive pericarditis in end-stage renal disease: insights and pathophysiology. Clin Cardiol. 2017;40(10):839–846.