【关键词】 腺病毒,犬；电异质性；逆转录聚合酶链反应 【Abstract】 AIM: To investigate the expressions of mRNA of ICaL and ICaT across the canine left ventricular wall and to explore the possible molecular mechanism and significance of electrical heterogeneity. METHODS: The mRNA expressions of the ICaL αsubunit Cav1.2, ICaT transcript Cav3.1 were quantified by semiquantitative RTPC..