Small Bowel Volvulus

A 24-year-old previously healthy man presents with sudden-onset severe periumbilical colicky pain, bilious vomiting, and absent bowel sounds. On examination, he is hypotensive (88/54 mmHg), tachycardic (128/min), febrile (38.2°C), with diffuse abdominal tenderness and guarding. CT abdomen shows dilated small bowel loops with edematous walls and poor mural enhancement. The structure marked **B** in the diagram—the whirl sign—is demonstrated on imaging with the superior mesenteric vessels twirling around the SMA in a clockwise fashion. Which of the following best describes the pathophysiological consequence of the finding marked **B** in this clinical context?