Cardiac function in Ghanaian children with severe malaria.

Area of Science:

• Pediatric infectious diseases
• Cardiovascular physiology in critical illness
• Malaria pathophysiology

Background:

• Severe malaria presents with complex physiological derangements.
• Cardiac dysfunction is a potential contributor to severe malaria symptoms, including metabolic acidosis.
• Understanding these relationships is crucial for managing pediatric severe malaria in endemic areas.

Purpose of the Study:

• To investigate the role of cardiac function in severe malaria symptoms, particularly metabolic acidosis, in children.
• To differentiate the etiological factors contributing to high cardiac output and metabolic acidosis in severe malaria.

Main Methods:

• A prospective observational study involving 183 children with severe malaria.
• Assessment of hemodynamic status and cardiac function using cardiac ultrasonography at admission and follow-up.
• Measurement of blood gas analyses, cardiac enzymes, and parasite levels to evaluate metabolic acidosis and cardiac function.

Main Results:

• Cardiac index (CI) was significantly elevated upon admission compared to recovery (P < 0.001).
• Increased CI correlated with lower hemoglobin levels but not with impaired tissue perfusion or metabolic acidosis.
• Parasite levels significantly influenced metabolic acidosis, whereas CI was not directly affected by parasite load. Findings were most pronounced in children under 2 years.

Conclusions:

• High output status (increased CI) in severe malaria is associated with anemia (low hemoglobin levels).
• Metabolic acidosis in severe malaria is primarily linked to parasite levels.
• Age is a significant factor, with younger children (<2 years) exhibiting more pronounced alterations.