What is a typical sign of cardiac irritability on cardiac monitoring?

Cardiac irritability on cardiac monitoring is often indicated by the presence of premature ventricular contractions (PVCs). PVCs are abnormal heartbeats that occur when a ventricle contracts before it is supposed to. This occurs due to irritability of the cardiac tissue, which can be triggered by a variety of factors such as ischemia, electrolyte imbalances, or increased sympathetic tone.

The presence of PVCs suggests that the heart is reacting to stimuli in a way that is not typical, indicating that there may be underlying issues affecting its normal electrical conduction. This can lead to more serious arrhythmias if left unmonitored or untreated.

Other manifestations of cardiac problems, such as regular heart rhythm, hypotension, or arrhythmia resolution, do not specifically indicate irritability. A regular heart rhythm suggests stable electrical activity without disturbances, hypotension can result from various cardiac conditions but does not specifically denote irritability, and resolution of arrhythmia refers to a return to normal rhythm rather than the presence of irritability itself. Thus, observing PVCs is the most indicative sign of cardiac irritability on monitoring.