General characteristics and echocardiographic parameters of the ER, control 1 and 2 groups.

ER, early repolarization syndrome; * P < 0.05, compared with QTd in the control 1 or Control 2 group. # P < 0.01, compared with the short axis value. Control 2 group: age-and gender- matching patients from control1 group with ER group. General characteristics and echocardiographic parameters of the ER, control 1 and 2 groups.ER：早期复极综合征（early repolarization syndrome）； * P < 0.05，与对照组1或对照组2的QT离散度（QTd）相比； # P < 0.01，与短轴测量值相比； 对照组2：与ER组患者年龄、性别相匹配的对照组1受试者； ER组、对照组1及对照组2的一般特征与超声心动图参数。