Here at Physician's Resource Network, we specialize in Stress Test/Stress Echo. If you have a broken Quinton Q-Stress, GE Case, or Burdick Quest console, we can build you a new Nassiff Cardiocard stress system, that is completely compatible with your existing TM55 ST55 Series 2000 treadmills. The system includes: Cardiocard Resting ECG system Cardiocard Stress ECG system Cardiocard Holter ECG system 1 Year support for the PC based system. 90 Day support for the Treadmill. $8500 for complete system with treadmill of choice.