Irregular heartbeat refers to a condition where the rhythm of your heart is not regular or consistent. It means that your heart may beat too fast, too slow, or with irregular pauses between beats. This can occur due to various reasons such as stress, anxiety, medication side effects, or an underlying medical condition like atrial fibrillation or bradycardia. An irregular heartbeat is also known as arrhythmia and it may cause symptoms such as dizziness, shortness of breath, chest pain, or palpitations. It can be diagnosed through various tests including an electrocardiogram (ECG) or a Holter monitor. Treatment for irregular heartbeat depends on the underlying cause and may include medication, lifestyle changes, or medical procedures like cardioversion or ablation.