Are the initial pH and the lactate values after cardiopulmonary resuscitation always crucial?

A 52-year-old man suffered an out-of-hospital cardiac arrest (OHCA) and bystander reanimation was immediately started. The initial electrocardiogram indicated ventricular fibrillation. After repetitive defibrillations as well as intravenous administration of amiodarone, a temporary return of spontaneous circulation (ROSC) could be established. Due to unstable cardiovascular conditions with recurrence of ventricular fibrillation, mechanical resuscitation with the help of the LUCAS (TM) device was initiated, and the patient was admitted to our hospital for emergency coronary angiography after a cumulative period of approximately 90min. The initial blood gas analysis displayed a significant lactate acidosis with a pH value of 6.7. Therefore, in a multidisciplinary team, the decision was made against an extracorporeal membrane oxygenation and for a coronary angiography under continuation of mechanical resuscitation. After multiple stenting of the right coronary artery and left anterior descending coronary artery, permanent ROSC could be established. The patient was admitted to our intensive care unit, where he was further treated according to the S3-guideline for infarct-related cardiogenic shock. In the course of time, the patient was quickly extubated without any neurological deficits