A 58-year-old man on ICU has just been commenced on VA-ECMO for refractory cardiogenic shock. The team notes the arterial line in the right radial artery shows a non-pulsatile waveform. What explains this?AThe arterial line is malfunctioningBVA-ECMO provides continuous (non-pulsatile) blood flow via the centrifugal pump - if the native heart has minimal residual function, the arterial waveform will be non-pulsatile; the return of arterial pulsatility indicates recovery of native cardiac contractility and is a positive prognostic signCThe patient is in cardiac arrestDThe blood pressure cuff is too tightENon-pulsatile flow is never seen on VA-ECMOCheck my answer