ECMO is used by emergency service in Paris and they it bring to the patient wherever he is having a cardiac arrest. This is really changing how many people will survive a out of hospital cardiac arrest, as a lot of people saved can resume a normal life (about 40% from 6% without it)

If you understand French here is a video of how the procedure is done. https://youtu.be/bX5yZFM2Dn4?si=h0hod5XXgWCWrfLa