HAVANA, April 2 -- Doctors at Cuba's main pediatric heart hospital face wrenching decisions as a US fuel blockade further strains an already fragile health system: which children receive life-saving treatment first-and which must wait longer.

During a visit by AFP journalists, mothers wearing medical masks were bedside next to children sitting or laying in dim rooms, with the sun providing the only light through the windows.

Universal health care is one of the proud achievements of the Cuban revolution, but the island's hospitals have struggled with shortages and aging equipment for years.

The situation has deteriorated since US President Donald Trump imposed a de facto oil blockade in January, with Cubans enduring daily blackouts that...