Objective: To report the feasibility, complications, and outcomes of emergency extracorporeal life support (ECLS) in refractory cardiac arrests in medical intensive care unit (ICU).
Design and setting: Prospective cohort study in the medical ICU in a university hospital in collaboration with the cardiosurgical team of a neighboring hospital.
Patients: Seventeen patients (poisonings: 12/17) admitted over a 2-year period for cardiac arrest unresponsive to cardiopulmonary resuscitation (CPR) and advanced cardiac life support, without return of spontaneous circulation.
Interventions: ECLS femoral implantation under continuous cardiac massage, using a centrifugal pump connected to a hollow-fiber membrane oxygenator.
Measurements and results: Stable ECLS was achieved in 14 of 17 patients. Early complications included massive transfusions (n=8) and the need for surgical revision at the cannulation site for bleeding (n=1). Four patients (24%) survived at medical ICU discharge. Deaths resulted from multiorgan failure (n=8), thoracic bleeding(n=2), severe sepsis (n=2), and brain death (n=1). Massive hemorrhagic pulmonary edema during CPR (n=5) and major capillary leak syndrome (n=6) were observed. Three cardiotoxic-poisoned patients (18%, CPR duration: 30, 100, and 180 min) were alive at 1-year follow-up without sequelae. Two of these patients survived despite elevated plasma lactate concentrations before cannulation (39.0 and 20.0 mmol/l). ECLS was associated with a significantly lower ICU mortality rate than that expected from the Simplified Acute Physiology Score II (91.9%) and lower than the maximum Sequential Organ Failure Assessment score (>90%).
Conclusions: Emergency ECLS is feasible in medical ICU and should be considered as a resuscitative tool for selected patients suffering from refractory cardiac arrest.