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http://dx.doi.org/10.3795/KSME-B.2011.35.11.1205

Development of a Pacemaker with a Ventricular Assist Device for End-Stage Heart Failure Patients  

Kim, Yoo-Seok (Dept. of Mechanical and Mechatronics Engineering, Kangwon Nat'l Univ.)
Park, Sung-Min (School of Medicine, Kangwon Nat'l Univ.)
Choi, Seong-Wook (Dept. of Mechanical and Biomedical Engineering, Kangwon Nat'l Univ./Medical & Bio-Material Research Center, Kangwon Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.11, 2011 , pp. 1205-1211 More about this Journal
Abstract
In this paper, we developed a pacemaker that can increase the efficacy of a left ventricular assist device (LVAD) and increase the survival rate for patients suffering end-stage heart failure. Because LVAD patients can experience arrhythmia, the pacemaker incorporated into the LVAD has the important role of sustaining sufficient blood circulation during arrhythmia. The electrode of the pacemaker is located at the apex of the left ventricle, where the VAD's inlet cannula is connected. This is efficient placement, in that the electrode can transmit electrical stimulation directly to the Purkinje fibers of the myocardium. The pacemaker can change the stimulation rate from 0 bpm to 191.4 bpm when a button is pressed on the external control module, and the pacemaker normally stimulates the heart at 60 bpm with 0.25 J of energy. We performed animal experiments to evaluate the performance and reliability of the combination of the LVAD and pacemaker. At pacemaker stimulation rates of 86.4 bpm, 100.2 bpm, 126.6 bpm, we recorded the ECGs, aortic pressures, and flow rates to analyze the heart loads.
Keywords
Pacemaker; Ventricular Assist Device; Cannula Electrode; Electrical Therapy;
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