Premature beats are a kind of ectopic heart rhythm. It can be triggered by emotional excitement and other factors, and is often accompanied by symptoms such as palpitations, dizziness, and in some patients, chest tightness and dyspnea. Premature beats can occur on the basis of sinus or ectopic rhythms, which is a relatively common type of ectopic rhythm. It can be induced by emotional excitement, nervousness and excessive smoking. Some patients may experience a sense of cardiac pause and a strong heartbeat. Patients with premature beats are accompanied by palpitations and weakness, dizziness and other symptoms. Some patients with chest pain, dyspnea and other symptoms, suggesting the possible existence of coronary heart disease. If accompanied by fatigue, fever, muscle pain and other symptoms, suggesting the possible existence of myocarditis. Patients diagnosed with premature beats who experience symptoms such as palpitations and fatigue are advised to go to the hospital for timely treatment.