What does arrhythmia refer to?

Arrhythmia refers to an abnormal or irregular heartbeat. It is a condition that affects the electrical impulses that coordinate the heartbeats, leading to issues such as a heartbeat that may be too fast, too slow, or out of rhythm. Understanding arrhythmia is essential because it can significantly impact cardiac function and overall health, sometimes leading to serious complications like stroke or heart failure if not properly managed.

The other choices describe unrelated medical conditions. Skin tissue conditions, cancerous growths, and inflammation of the eyelid pertain to different areas of medical concern that do not involve the heart’s rhythm or function. Thus, the focus on an irregular heartbeat accurately captures the essence of what arrhythmia is.