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首页> 外文期刊>Circulation journal >Usefulness of a novel ultrasound transducer for continuous monitoring treadmill exercise echocardiography to assess coronary artery disease.
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Usefulness of a novel ultrasound transducer for continuous monitoring treadmill exercise echocardiography to assess coronary artery disease.

机译：新型超声换能器用于连续监测跑步机运动超声心动图以评估冠状动脉疾病的有用性。

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摘要

BACKGROUND: The feasibility of a novel ultrasound probe, which can be attached to the left ventricular (LV) apex chest wall and allows free rotation around its long axis direction for the continuous monitoring of LV wall motion, was tested. METHODS AND RESULTS: There were 36 subjects who had coronary artery disease (CAD). By attaching a novel ultrasound probe to the chest wall, the LV apical views were recorded during treadmill exercise stress echocardiography (Echo). The continuous monitoring of LV wall motion was satisfactorily feasible in 30 of 36 patients. The visualization rate of the overall LV segments was higher at rest (90%) compared to that during peak exercise (77%). The segments were better visualized in apical portions (90-100%) than in mid (77-96%) or basal portions (68-87%). The sensitivity, specificity, and accuracy for detecting CAD were 61, 100 and 77%, respectively. The wall motion score index 3 and 6 min after exercise decreased significantly compared to those at peak exercise. The number of segments with dyssynergy was highest at the peak exercise. Ischemic ST-T depression on electrocardiography was observed only at peak stress periods. CONCLUSIONS: Continuous monitoring treadmill exercise Echo using a novel ultrasound probe seems feasible for the non-invasive and physiological assessment of CAD.
机译：背景：测试了一种新型超声探头的可行性，该探头可以连接到左心室（LV）的心尖胸壁，并允许绕其长轴方向自由旋转以连续监测LV壁的运动。方法和结果：有36名患有冠状动脉疾病（CAD）的受试者。通过在胸壁上安装新型超声探头，可在跑步机运动应力超声心动图（Echo）记录下LV顶视图。对36名患者中的30名患者，连续监测LV壁运动是可行的。静息状态下总体左心室节段的可视化率（90％）高于高峰运动时的可视化率（77％）。在心尖部分（90-100％）比中部部分（77-96％）或基础部分（68-87％）的节段可视化更好。检测CAD的敏感性，特异性和准确性分别为61％，100％和77％。与运动高峰时相比，运动后3和6分钟的壁运动得分指数显着降低。在峰值运动时，具有协同不良作用的节段数最高。心电图上仅在峰值应激期观察到缺血性ST-T降低。结论：使用新型超声探头连续监测跑步机的运动回声似乎对CAD的无创和生理评估是可行的。

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