What indicates the rate modulation capability in NBG codes?

The indication of rate modulation capability in NBG (North American Society of Pacing and Electrophysiology/Boston Scientific) codes is represented by the letter R. In the context of cardiac pacing, rate modulation refers to the ability of a pacemaker to adjust the pacing rate in response to the physiological demand, such as increased heart rate during physical activity.

In NBG coding, different letters represent specific features of the pacemaker's function. The R in the second position of the code indicates that the device has rate modulation capability, enabling it to adapt the pacing rate according to the patient's needs. This feature is particularly important for improving exercise tolerance and overall patient well-being, as it allows the pacemaker to mimic the natural response of the heart during varying levels of physical activity.