A 58-year-old man from Delhi presents to the emergency department with acute-onset severe substernal chest pain radiating to the left arm, associated with diaphoresis and dyspnea for the past 3 hours. His blood pressure is 95/60 mmHg, heart rate 110/min, and respiratory rate 24/min. ECG shows ST elevation in leads II, III, and aVF with reciprocal ST depression in leads I and aVL. Cardiac troponin I is elevated at 2.8 ng/mL (normal <0.04). A coronary angiogram reveals complete occlusion of the right coronary artery. Which of the following pathological processes is MOST likely occurring in the myocardium at this moment?