METHODS: The quasi-steady state current-voltage relationship from the isolated rat ventricular myocytes was measured using whole-cell voltage-clamp techniques with a ramppulse protocol.
方法：应用全细胞电压箝技术的斜坡脉冲程序，测定离体大鼠心肌细胞准稳态电流-电压关系曲线。
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As the ramp moves farther positive, a greater percentage of the triangle wave will be lower than the ramp voltage producing a wider pulse and brighter light.