26th April 2024

A 70-year-old woman with a history of atrial fibrillation presents with acute onset of severe diffuse abdominal pain that started 2 hours ago.

A 70-year-old woman with a history of atrial fibrillation presents with acute onset of severe diffuse abdominal pain that started 2 hours ago. She reports a recent episode of diarrhoea but no vomiting. Her past medical history includes hypertension and type 2 diabetes mellitus. Her temperature is 36.7°C, pulse rate is irregular at 100 bpm, and blood pressure is 150/90 mmHg. On examination, her abdomen is soft with minimal tenderness but seems distended.

Investigations:

Blood tests show leukocytosis and elevated lactate levels.

Which is the most likely diagnosis?