All Hugo Sachs Elektronik dedicated Isolated Heart Systems are available with many advanced features including the ability to perfuse under either constant pressure or constant flow conditions. The systems have the ability to switch between Langendorff (retrograde perfusion) and Working Heart (ejecting) operation, online, in the same heart, with just a few simple manipulations. They also feature a flow resistance and compliance chamber to more closely mimic in-vivo cardiac after-load.