Magnetic propulsion and bearing for a hemodynamic support pump

A blood pump, comprising:

• an impeller assembly housing;
• a magnetic field source coupled to the impeller assembly housing;
• an impeller assembly within the impeller assembly housing and including a longitudinal axis, an impeller, and a driven magnet, the driven magnet being longitudinally offset and distally disposed relative to the magnetic field source, the driven magnet being rotatable and longitudinally controlled by the magnetic field source, and the driven magnet comprising a distal side, the distal side facing the impeller;
• and
• a bearing assembly within and in contact with the impeller assembly housing and near the distal side of the driven magnet, wherein the bearing assembly is aligned longitudinally with a center of mass of the impeller assembly;
• wherein the impeller assembly further includes a shaft extending through the impeller and the driven magnet along the longitudinal axis.