In which unit is impedance measured?

Impedance is measured in ohms, which is the standard unit for electrical resistance in a circuit. This measurement reflects how much a circuit opposes the flow of alternating current. Understanding impedance is crucial, especially in pacing and cardiac devices, as it influences the proper functioning and efficiency of the device in delivering electrical signals to the heart. The unit ohm is named after the German physicist Georg Simon Ohm, who formulated Ohm's law, establishing the fundamental relationship between current, voltage, and resistance in electrical circuits. Thus, when discussing the properties of pacing leads and their interactions with heart tissue, recognizing that impedance is quantified in ohms allows for a better understanding of the electrical characteristics crucial for device performance and patient safety.