The present disclosure provides systems and methods for cardiac stimulation. The cardiac stimulation system includes a first cardiac stimulation device implanted in a subject, and a second cardiac stimulation device implanted in the subject and communicatively coupled to the first cardiac stimulation device. The cardiac stimulation system is configured to detect an arrhythmia in the subject, and apply a shocking pulse in response to the detected arrhythmia by supplying a first output voltage from the first cardiac stimulation device and a second output voltage from the second cardiac stimulation device, wherein the first output voltage has a first polarity and the second output voltage has a second polarity that is opposite from the first polarity.
