两阶段脉冲控制螺旋波的数值模拟

Simulation on Control of Spiral Wave by Two-stage Pulse Force

提出两种两阶段的螺旋波控制方法,第一阶段用正相脉冲力作用快变量,第二阶段用反相脉冲力作用快变量或用正相脉冲力作用慢变量,用修改后的Br模型进行数值模拟,结果表明：两阶段的脉冲控制方法比单阶段控制方法更有效地控制螺旋波,作用力可以减少到后者力大小的38%~55%.结果建议,可以通过两阶段控制螺旋波的方法改进心脏电除颤.

Modified Br model is used to study suppression of spiral wave. Methods of suppressing spiral wave by two-stage pulse force control are proposed. In the first stage,fast variable of the model is acted by a positive rectangular pulse force. In the second stage,direction of force is changed to the opposite or the force is acted on the slow variable. It shows that two-stage pulse control method is more efficient than one-stage method,and magnitude of the force is 38% ~ 55% of the latter. It suggests that two-stage method of control of spiral wave can improve defibrillation efficiency.