Priority Nursing Intervention
The priority during the acute phase with carditis is to enforce strict bed rest. This non-pharmacological measure minimizes myocardial oxygen consumption by reducing heart rate and contractile force, protecting the inflamed myocardium and valves from further stress. The duration of bed rest is guided by clinical markers such as resting heart rate, ESR, and C-reactive protein levels, and it is gradually liberalized as inflammation subsides.
Monitoring for Complications
Continuous assessment for signs of heart failure is critical. The nurse must monitor for tachycardia disproportionate to fever, a new or changing heart murmur, gallop rhythm (S3), pericardial friction rub, and signs of pulmonary congestion such as tachypnea, cough, and crackles. Daily weights, strict intake and output, and abdominal girth measurements for hepatomegaly are essential to detect fluid retention early.
Supportive Care and Patient Education
Joint pain from migratory polyarthritis is managed with comfort measures, gentle passive positioning, and a supportive mattress, not active exercise. A nutritious, low-sodium diet is provided to prevent fluid overload. The child's emotional and developmental needs are met through quiet, non-stimulating activities like reading or board games, not frequent visitors. Family education must emphasize the critical role of adherence to secondary antibiotic prophylaxis with intramuscular benzathine penicillin G every 3–4 weeks to prevent recurrent episodes and progressive rheumatic heart disease.