MAP was monitored before CPB ( t_1 ), at times of initiating anterior parallel circulation ( APC ) ( t_2 ), of posterior parallel circulation ( PPC ) ( t_3 ) and CPB stopping ( t_4 ).

• 观察CPB前(t_1)、前并行循环(t_2)、后并行循环(t_3)及停机时(t_4)MAP及自动复跳后HR、自动复跳率及心律等血流动力学变化。