When current is measured in a pacing device, which factor directly influences it?

In pacing devices, the amount of current that flows is influenced by both resistance and voltage. According to Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R), the interplay of these two factors can be understood more clearly.

When voltage levels in the device are increased while resistance remains constant, the current will proportionally increase. Conversely, if resistance increases but voltage stays constant, the current will decrease. Thus, both factors directly affect the amount of current that can be delivered by the pacing device.

This interdependence means that understanding the relationship between voltage and resistance is crucial for effective pacing. In clinical practice, adjustments to voltage settings can be necessary to ensure appropriate current levels for optimal pacing function.

Therefore, the correct answer encapsulates the comprehensive understanding that both resistance and voltage work together to influence the current in a pacing device.