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. Author manuscript; available in PMC: 2018 Apr 13.
Published in final edited form as: Med Eng Phys. 2011 Jun 15;33(10):1193–1202. doi: 10.1016/j.medengphy.2011.05.008

Figure 1.

Figure 1

The minimally invasive counterpulsation device (Symphony) is designed for the chronic treatment of heart failure and to promote myocardial recovery. The Symphony is implanted in a subcutaneous pocket in the right anterior chest contralateral to an implantable cardioverter defibrillator. A percutaneous driveline exits the anterior chest at the midclavicular line just below the right costal arch and attaches to an external pneumatic driver. The (1) counterpulsation blood chamber (right) fills during native systole and empties during native diastole through a (2) single, valveless ePTFE graft anastomosed to the subclavian artery. A polyurethane membrane in the air chamber is inflated/deflated by an (3) airline connected to an external pneumatic driver.