A multi-function defibrillator having an improved mode selection switch (200). When the switch is rotated to select the desired mode of operation, such as defibrillation, cardio-version, pacing, or monitoring, the positioning of those modes related to the Off position (205) is based on the time-criticality of the corresponding therapy. The most time-critical therapy is located closest to the Off position, and the least time-critical therapy is located furthest away from the Off position.
