The conditions we use ECMO for vary widely, but include severe pneumonia, severe forms of the acute respiratory distress syndrome (ARDS), severe asthma (status asthmaticus), pulmonary hypertensive crisis, massive pulmonary embolism (blood clot in the lungs), acute coronary syndrome (heart attack), acute decompensated heart failure, severe myocarditis, and post-cardiotomy shock (shock following open heart surgery).