The present technology generally includes devices, systems, and methods for providing electrical stimulation to the left ventricle of a human heart in a patient suffering from Left Bundle Branch Block (LBBB). In particular, the present technology includes an implantable receiver-stimulator and an implantable controller-transmitter for leadless electrical stimulation of the heart. The receiver-stimulator can include one or more sensors capable of detecting the electrical conduction of the heart and the receiver-stimulator can be configured to pace the stimulation of the left ventricle based off the sensed electrical conduction to achieve synchronization of the left and right ventricles.
