Implantable system for stimulating a human or an animal heart

An implantable system for stimulating a human heart or an animal heart, comprising a first stimulation unit and a first detection unit, the first stimulation unit being used to stimulate at least one cardiac region of a human heart or an animal heart, and the first detection unit being used to detect an electrical signal of at least one cardiac region of the same human or animal heart, the system further comprises a second stimulation unit, which is specifically designed and configured to stimulate a His bundle of the same human or animal heart,

• wherein the system further comprises a first timer, which is used to provide a defined delivery of stimulation pulses, in terms of time, by the first stimulation unit, and the system further comprises a second timer, which is provided and configured to match a delivery point in time of at least one pulse to be delivered by the second stimulation unit to a delivery point in time of at least one pulse to be delivered by the first stimulation unit.