Premature contractions, also known as preterm contractions, are premature heart beats. Symptoms of premature contractions are panic, palpitations, and a feeling of cardiac arrest. 1. Panic: Often due to emotional excitement and nervousness, the heart pacing point is ectopic and emanates from other parts of the heart such as atria, AV node and ventricles, and then you will feel the symptom of panic. 2. Palpitation: If you take drugs such as quinidine sulfate tablets, digoxin tablets, etc., drug stimulation can lead to occasional or frequent premature beats, which manifests itself as irregularly occurring after one and several normal beats, forming dysthymia or irregular manifestations such as premature cardiac beats, i.e., you will feel the symptom of palpitation. 3. Cardiac pause: If you suffer from heart disease, such as coronary heart disease, rheumatic heart disease, etc., which can lead to premature heart beat, to the next normal apical beat interval is longer, that is, the compensation interval of premature heart beat, at this time there can be a cardiac pause. If there is panic, palpitations, cardiac arrest, etc., it is recommended to go to the regular hospital in a timely manner, and follow the doctor’s instructions for systematic treatment after the results of the examination come out.