OBJECTIVE To compare between noradrenaline and isoprenaline in their effect on type L calcium channel electrical current of rat ventricle myocyte and explore into the possible mechanism.

• 目的比较去甲肾上腺素与异丙肾上腺素对大鼠心室肌细胞L型钙电流的作用强度,分析其可能的机制。