Sicari Rosa, Nihoyannopoulos Petros, Evangelista Arturo, Kasprzak Jaroslav, Lancellotti Patrizio, Poldermans Don, Voigt Jen-Uwe, Zamorano Jose Luis
Institute of Clinical Physiology, Via G. Moruzzi, 1, 56124 Pisa, Italy.
Eur J Echocardiogr. 2008 Jul;9(4):415-37. doi: 10.1093/ejechocard/jen175.
Stress echocardiography is the combination of 2D echocardiography with a physical, pharmacological or electrical stress. The diagnostic end point for the detection of myocardial ischemia is the induction of a transient worsening in regional function during stress. Stress echocardiography provides similar diagnostic and prognostic accuracy as radionuclide stress perfusion imaging, but at a substantially lower cost, without environmental impact, and with no biohazards for the patient and the physician. Among different stresses of comparable diagnostic and prognostic accuracy, semisupine exercise is the most used, dobutamine the best test for viability, and dipyridamole the safest and simplest pharmacological stress and the most suitable for combined wall motion coronary flow reserve assessment. The additional clinical benefit of myocardial perfusion contrast echocardiography and myocardial velocity imaging has been inconsistent to date, whereas the potential of adding - coronary flow reserve evaluation of left anterior descending coronary artery by transthoracic Doppler echocardiography adds another potentially important dimension to stress echocardiography. New emerging fields of application taking advantage from the versatility of the technique are Doppler stress echo in valvular heart disease and in dilated cardiomyopathy. In spite of its dependence upon operator's training, stress echocardiography is today the best (most cost-effective and risk-effective) possible imaging choice to achieve the still elusive target of sustainable cardiac imaging in the field of noninvasive diagnosis of coronary artery disease.
负荷超声心动图是二维超声心动图与体力、药物或电负荷的结合。检测心肌缺血的诊断终点是负荷期间局部功能的短暂恶化。负荷超声心动图与放射性核素负荷灌注成像具有相似的诊断和预后准确性,但成本大幅降低,对环境无影响,对患者和医生也无生物危害。在具有可比诊断和预后准确性的不同负荷中,半卧位运动是最常用的,多巴酚丁胺是评估存活心肌的最佳检测方法,双嘧达莫是最安全、最简单的药物负荷,最适合联合评估室壁运动和冠状动脉血流储备。心肌灌注对比超声心动图和心肌速度成像的额外临床益处迄今并不一致,而经胸多普勒超声心动图评估左前降支冠状动脉血流储备的潜力为负荷超声心动图增添了另一个潜在的重要维度。利用该技术的多功能性而新兴的应用领域是瓣膜性心脏病和扩张型心肌病中的多普勒负荷超声心动图。尽管负荷超声心动图依赖于操作者的培训,但在冠状动脉疾病无创诊断领域,它仍是实现可持续心脏成像这一难以捉摸目标的最佳(最具成本效益和风险效益)成像选择。