the correspondence between the regional differences in repolarization and in the expression of the troponin t isoforms in adult and newborn atria suggests that 1 ) cellular ionic mechanisms vary regionally to coordinate differences in action potential configuration with differences in cell properties that regulate contractility and 2 ) genetic expression of the systems that regulate repolarization and mechanical cellular properties are under similar developmental and regional control .
C0077404
troponin t
C0026820
contractility