Fig. 4
Changes in rSO2 and continuous aEEG pattern in PCAS. A male in his 50s collapsed suddenly while running. He received by-stander CPR and his initial cardiac rhythm indicated ventricular fibrillation. Defibrillation was performed by paramedics (34 min after collapse) and the patient was transferred to our hospital. ROSC was obtained and therapeutic hypothermia initiated immediately following his admission. The initial rSO2 value was around 45 % after ROSC. The aEEG pattern was flat at 3 h after ROSC (b) and shifted to a continuous pattern over the next 21 h (c). His final neurological outcome was favorable. a rSO2 (%); B: aEEG, 3 h after ROSC; (c): aEEG, 24 h after ROSC. Arrows; (a): BP 100/54 mmHg, arterial gases: PaCO2 32.7 mmHg, pH 7.338; (b): BP 182/112 mmHg, arterial gases: PaCO2 28.4 mmHg, pH 7.437; (c): BP 174/120 mmHg arterial gases: PaCO2 36.6 mmHg, pH 7.400. BP: blood pressure; ROSC: return of spontaneous circulation; rSO2: regional cerebral oxygen saturation; aEEG: amplitude-integrated electroencephalography