A cardiac pacing device (10) to be disposed in a heart between an atrium (4) and an atrial appendage (5) protruding from the atrium includes a blocker (1) and a regulator (2) attached to the blocker (1) . The blocker (1) is configured to occlude the atrial appendage. The regulator (2) is configured to contact the heart when the blocker (1) is positioned between the atrium (4) and the atrial appendage (5) to occlude the atrial appendage (5) in order to regulate a cardiac rhythm of the heart accordingly
