Frequent unifocal PVCs are representative of what?

Frequent unifocal PVCs are representative of what?

• A. Healthy cardiac function
• B. Increased heart rate
• C. Poor oxygenation state of the automaticity focus
• D. Normal sinus rhythm

Answer: (C)

Frequent unifocal premature ventricular contractions (PVCs) indicate that there is a specific automaticity focus in the ventricles that is firing early, which may be a sign of irritability in the cardiac tissue. This irritability can stem from various factors, such as ischemia, electrolyte imbalances, or even increased sympathetic stimulation. When the automaticity focus is not receiving adequate oxygenation, it tends to become hyperexcitable, leading to these frequent unifocal PVCs. This situation is reflective of a poor oxygenation state in the context of the cells in that area of the heart.

This physiological response demonstrates that the heart's ability to conduct electrical impulses normally is being compromised, hence supporting the idea that frequent unifocal PVCs represent a departure from ideal cardiac function due to potential underlying pathology or stressors acting on the myocardium.