Aim:To measure the QT dispersion degree (QTd) before and after transmyocardial revascularization by laser (TMR) and assess its clinical value.

• 目的 :测量激光心肌血运重建术 (TMR)后的 QT离散度 (QTd)和心率校正 QT离散度 (QTcd) ,并探讨其临床意义。