Dysrhythmia refers to an irregular heartbeat. There are various synonyms that can be used to describe the same medical condition. Some of the synonyms include arrhythmia, irregular heartbeat, abnormal heart rhythm, and irregular cardiac rhythm. Other synonymous terms include heart flutter, tachycardia, bradycardia, and palpitations. Dysrhythmia can be caused by various factors, including heart disease, aging, medications, stress, alcohol consumption, and smoking. It may be benign or life-threatening, depending on the underlying cause and severity of the condition. Therefore, it is important to seek medical attention in cases of persistent or severe dysrhythmia.