Antonyms for "Atrial Ectopic Beats" could include words or phrases like "regular heart rhythm," "normal heartbeat," or "sinus rhythm." These terms indicate a healthy, steady pattern of heart activity, in contrast to the irregular, abnormal heartbeats that characterize Atrial Ectopic Beats. Other antonyms might include "heart health," "cardiac stability," or "regular cardiac function." These words all suggest the absence of the conditions and symptoms associated with Atrial Ectopic Beats, such as palpitations, dizziness, and shortness of breath. Overall, antonyms for this medical term focus on the importance of maintaining a stable, healthy heart rhythm for optimal cardiovascular health.