What is noted as a potential cause of premature ventricular contractions?

Premature ventricular contractions (PVCs) are often caused by various factors, and stimulant use is a well-documented risk factor for this type of dysrhythmia. Stimulants, which can include caffeine, nicotine, certain medications, and illicit drugs, can increase heart rate and excitability of the cardiac tissue. This heightened state can lead to ectopic foci in the ventricles, resulting in PVCs. The use of stimulants can disrupt the normal electrical activity of the heart, making it more susceptible to arrhythmias, including PVCs.

High potassium levels, high calcium levels, and low blood pressure are generally associated with other types of cardiac strain and dysrhythmias rather than directly inducing PVCs. While electrolyte imbalances can lead to various cardiac disturbances, they don't typically manifest primarily as PVCs. Low blood pressure may influence the heart's performance but is not directly linked to the occurrence of PVCs in the same way stimulants are. Therefore, stimulant use stands out as the most relevant cause for triggering premature ventricular contractions.