Provided is a microfluidic injection device and a method for injecting microfluidic. The device includes a pulse generator adapted to be coupled to an implantable cardiac stimulation electrode and a power supply that maintains the stimulation electrode at a negative voltage. By the base on the circuit board, the electric card is restricted by the opening of the base to a predetermined position. A pump housing is positioned to receive water flow from the propeller and direct the water flow to a nozzle outlet.