The ratios of mitral valvular ring motion velocity for evaluating the left ventricular diastolic function by DTI is better than those of the conventional mitral flow velocity spectrum.

• 结论 慢性阻塞性肺病会引起左室舒张功能异常,DTI技术检测二尖瓣环运动速度之比评价左室舒张功能优于二尖瓣口血流流速曲线。