Schwartz S L, Pandian N G, Crowley R, Kumar R
Department of Medicine, New England Medical Center Hospitals, Tufts University School of Medicine, Boston, MA.
Am Heart J. 1995 Mar;129(3):598-603. doi: 10.1016/0002-8703(95)90290-2.
Intracardiac echocardiography is a technique that uses catheter-based ultrasound transducers placed within the heart to image cardiac structures. One disadvantage to this technique is that it requires fluoroscopy for catheter placement. This study was performed to evaluate a prototype balloon-tipped, flow-directed catheter for use during intracardiac echocardiography in seven dogs. With the balloon deflated, the catheter could not be successfully advanced without fluoroscopy. Even with fluoroscopic imaging, catheter advancement was often difficult. With the balloon inflated, it could easily be passed into the pulmonary artery without fluoroscopy in 12 of 14 attempts. Images of the cardiac chambers, valves, and pulmonary artery could be obtained. In conclusion, use of a balloon-tipped, flow-directed catheter for intracardiac echocardiography and pulmonary artery imaging can be performed without the use of fluoroscopy. With continued refinements, such as enhancement of the visual field, intracardiac echocardiography could possibly be performed at the bedside to assess cardiac function or assist with interventional procedures.
心腔内超声心动图是一种利用置于心脏内的基于导管的超声换能器对心脏结构进行成像的技术。该技术的一个缺点是导管放置需要荧光透视。本研究旨在评估一种原型球囊尖端、血流导向导管在7只犬的心腔内超声心动图检查中的应用。在球囊未充盈的情况下，若无荧光透视，导管无法成功推进。即使有荧光透视成像，导管推进也常常困难。在球囊充盈的情况下，14次尝试中有12次无需荧光透视就能轻松将其送入肺动脉。可获得心脏腔室、瓣膜和肺动脉的图像。总之，使用球囊尖端、血流导向导管进行心腔内超声心动图检查和肺动脉成像无需荧光透视。随着不断改进，如扩大视野，心腔内超声心动图可能可以在床边进行，以评估心脏功能或辅助介入操作。
