Jennifer Lee is а 28-yeаr-оld G3P2 wоmаn at 39 weeks gestatiоn who is in active labor. She has had an uncomplicated pregnancy and is progressing well with strong contractions. Her cervix is dilated to 8 cm. Suddenly, during a particularly strong contraction, Jennifer becomes acutely short of breath and appears anxious. Within minutes, she becomes cyanotic and loses consciousness. Her vital signs are: BP 70/40 mmHg, HR 135 bpm, RR 32/min, SpO2 82% on room air. The fetal heart rate shows severe bradycardia at 80 bpm. The rapid response team is called. Based on Jennifer's sudden cardiovascular collapse and hypoxemia during labor, you and the healthcare team suspects what OB complication?