An irregular heartbeat (also called arrhythmia) refers to any disturbance in the heart’s rhythm and electrical function. Unlike palpitations, which describe how the heart feels, arrhythmias are defined by measurable electrical changes in the heartbeat and may or may not be felt by the individual.
Hormonal changes in menopause can influence the electrical system of the heart, increasing the risk for rhythm disturbances. In some women, lower estrogen levels can contribute to heightened sympathetic activity (the “fight or flight” branch of the nervous system), which may disrupt the regular pacing of the heart. Electrolyte shifts, increased anxiety, sleep disturbances, and changes in blood pressure or cholesterol during menopause may also play a role.
Irregular heart rhythms can range from harmless to medically significant. Some, like premature atrial contractions (PACs), are usually benign. Others, like atrial fibrillation (AFib), require medical attention and ongoing monitoring. Because arrhythmias may go unnoticed or be mistaken for anxiety or hot flashes, it’s important to seek evaluation if symptoms like fatigue, chest discomfort, irregular pulse, and dizziness or lightheadedness occur — especially if they are new or worsening.