PTH dose-dependently increased [ Ca2 + ] i in cardiomyocytes, at least partly due to augmented entry of calcium into cell via voltage-dependent Ca2+ channel.

• 甲状旁腺素显著增加静息心肌细胞[Ca~(2+)]_i,并呈浓度依赖性,电压依赖性钙通道开放引起的细胞外钙内流为其重要机制之一。