An implantable medical device having at least one electrical conductor that extends longitudinally and includes a functional lead. The functional lead is connected to an electrode pole to discharge therapeutic signals or to detect diagnostic signals, wherein the functional lead or the electrode pole, or both the functional lead and the electrode pole, are constructed with a ring shape in a first longitudinal section. The electrical conductor includes at least one second electrical lead which is routed in a spiral shape in the first longitudinal section in such a manner that electromagnetic radio frequency waves which can be conducted in the first electrical lead can be coupled into the second electrical lead in the first longitudinal section.
