Which parameter is NOT typically monitored by cardiac devices?

Monitoring of cardiac devices typically involves parameters that directly relate to heart function and rhythm. Heart rate variability, for instance, is an important measure that can indicate the autonomic regulation of heart rate, and it provides insights into the heart's response to stress and overall cardiovascular health. Similarly, bradyarrhythmias and tachyarrhythmias refer to abnormal heart rhythms that can lead to clinical complications; thus, monitoring these arrhythmias is crucial for managing patients with cardiac devices.

Trends in heart rate are also a key parameter monitored by such devices, as they can signal changes in patient condition and the effectiveness of therapy. These trends help healthcare providers make informed decisions regarding interventions and adjustments to treatment plans.

In contrast, monitoring the patient’s thermal regulation is not a focus of cardiac devices. Thermal regulation pertains more to the body's overall homeostasis and is typically assessed through other types of monitoring, such as temperature gauges in different healthcare settings. Thus, it is outside the scope of what is usually monitored by cardiac devices.