A 51-yeаr-оld pаtient is repоrting stоmаch pain and chest discomfort that is radiating down their left arm. The patient had coronary artery stents placed 5 days ago. The patient's skin is pale and cool to the touch. Their bloodpressure is 72/46 mm Hg, mean arterial pressure is 55 mm Hg, heart rate is 188/min, respiratory rate is 28 breaths per minute, and Spo2 is 89% on room air. The ECG shows ventricular tachycardia. While you administersupplemental oxygen, the patient suddenly loses consciousness, and the ECG monitor shows ventricular fibrillation. Which condition do you suspect led to the cardiac arrest?