Tragedy as 12-year-old dies suddenly after collapsingMia-Mai Grace Wiliams from Merthyr Tydfil had displayed no ill health or symptoms and death was likely caused by an infection causing cardiac arrest, an inquest heard. ‌The child was discovered unresponsive in cardiac arrest in one of the bedrooms, with evidence of vomiting, the hearing at Pontypridd Coroner's Court was told. South Wales Central area Coroner Patricia Morgan recorded death by natural caused caused by multiple organ dysfunction, cardiac arrest and lymphocytic myocarditis. ‌"She was discovered unresponsive in cardiac arrest in one of the bedrooms, with evidence of vomiting. "It was identified at post mortem that Mia was suffered with an myocarditis, a cardiac infection which likely caused cardiac arrest and sadly led to her passing."

Source: Daily Mirror March 03, 2026 16:48 UTC