Research Progress of J Wave Syndromes and Its Clinical Significance

J wave refers to a dome or hump wave on electrocardiogram which drifts off the baseline and is formed from an elevation of the QRS-ST junction(J point),amplitude≥0.1mV,period≥0.2ms.J wave syndromes was defined in researches in the past few years,referring to a series of collective clinical syndromes characterized by J wave on electrocardiogram,with the same ionic mechanism,the tendency of ventricular tachycardia-ventricular fibrillation-sudden cardiac death and combining with or without organic heart disease.Certain types of J wave syndromes have become new high-risk warning index of malignant ventricular arrhythmia and sudden cardiac death.So here is to make a review on the important research progresses of J wave syndromes in mechanism of ion flow and cell electrophysiology,genetic basis,clinical significance of classification and syndrome types and treatment in recent years.