Abstract
Purkinje fibers (PFs) permit the heart's conduction system to produce synchronized contractions of its ventricles, critical for continuing a reliable heart rhythm. Hardware realization of different parts of heart is done to simulate or dealing with some of diseases and deficiencies. PF performance can be described by models including a set of differential equations. In this paper the Noble model is modified for implementing a hardware to mimic the PF performance. The original model includes non-linear terms which are low speed and high cost regarding the hardware resources because of need to use the units such as multipliers. In modified model, the non-linear terms are converted to 2x terms to be implemented by low cost and high speed digital hardware such as logical SHIFTs, ADDs, and SUBs. The dynamic behavior of proposed model is close to the original model. A digital platform, Spartan 3xc3s50 tq144 Field Programmable Gate Arrays (FPGA) is used to certify the precision and feasibility of proposed model. The results show that the proposed model is easily implemented on this board and is able to produce different PF patterns at the maximum frequency of 162.273 MHz meanwhile the original model is not implementable because of its non-linear elements.
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