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1.
Rev. bras. cardiol. invasiva ; 23(3): 226-228, jul.-set.2015. ilus
Article in Portuguese | LILACS | ID: lil-794203

ABSTRACT

A tomografia de coerência óptica (TCO) pode fornecer informações essenciais sobre imagens de angiografiacoronária pouco claras. Em documentos de consenso atuais de interpretação de imagem de TCO, o cálcio é geralmente descrito como uma região de sinal óptico de baixa intensidade ou heterogêneo, com uma borda bem delineada, que pode ter características atípicas, como a que caracteriza o nódulo calcificado. Neste caso, um paciente estável apresentava uma imagem angiográfica intracoronária nebulosa. A imagem da TCO mostrava uma lesão convexa protuberante de aparência estranha, com bordas irregulares e alta atenuação, provavelmente relacionada a um nódulo calcificado. A lesão tinha uma relação complexa com a origem da artéria circunflexa, o que foi melhor compreendida após a reconstrução tridimensional...


Optical coherence tomography (OCT) can provide essential information on unclear coronary angiography images. In current consensus documents of OCT imaging interpretation, calcium is usually described as a signal-poor or heterogeneous region with a sharply delineated border, but it may have atypical features, such as the proposed “calcified nodule” entity. In this case, a stable patient presented a hazy intracoronary angiographic image. OCT imaging showed an odd-looking convex, protruding lesion with irregular borders and high attenuation likely related to a calcified nodule. The lesion had a complex relation to the leftcircumflex artery take-off, which was better understood after three-dimensional reconstruction...


Subject(s)
Humans , Male , Aged, 80 and over , Coronary Angiography/methods , Coronary Artery Disease/complications , Coronary Artery Disease/therapy , Tomography, Optical Coherence/methods , Prostheses and Implants , Aortic Valve Stenosis , Aortic Valve/surgery
2.
Arch. cardiol. Méx ; 83(2): 112-119, abr.-jun. 2013. ilus
Article in Spanish | LILACS | ID: lil-702996

ABSTRACT

La angiografía es la técnica de referencia para el diagnóstico de la enfermedad arte rial coronaria. Sin embargo, la mayoría de los síndromes coronarios agudos involucran lesiones angiográficamente no significativas. Es también la técnica de elección para guiar la implantación de prótesis endovasculares y su seguimiento. La tomografía de coherencia óptica es una técnica de imagen interferométrica que penetra en los tejidos alrededor de 2-3 mm y ofrece una alta resolución axial. Es capaz de distinguir diferentes tipos de tejido, como fibroso, lipídico, necrótico o calcificado, reconoce características de las placas de ateroma que se han asociado con progresión rápida de la lesión y eventos clínicos adversos, como la delgada capa de fibroateroma, el espesor de la capa fibrosa, la infiltración de macrófagos y la formación de trombos. En la actualidad, existe un creciente interés en el valor de la tomografía de coherencia óptica en el área de intervención coronaria, donde la técnica ofrece ventajas significativas sobre las técnicas intravasculares de diagnóstico convencionales, como la ecografía intravascular. Su alta resolución permite reconocer las complicaciones periprocedimiento, como microdisección, malaposición e hiperplasia neointimal, haciendo de esta herramienta una de las técnicas más prometedoras en el diagnóstico intravascular.


Coronary angiography is the reference technique for the diagnosis of coronary disease. However, the majority of acute coronary syndromes involve angiographically non- significant lesions. It is also the technique of choice for guiding the implantation of endovascular prostheses and their later monitoring. Optical coherence tomography is an interferometric imaging technique that penetrates tissue approximately 2-3 mm and provides axial and lateral resolution. It is able to distinguish different tissue types, such as fibrous, lipid-rich, necrotic, or calcified tissue. Optical coherence tomography is able to recognize a variety of features of athe- rosclerotic plaques that have been associated with rapid lesion progression and clinical events, such as thin cap fibroatheroma, fibrous cap thickness, dense macrophage infiltration, and thrombus formation. Currently, there is growing interest in the value of optical coherence tomography in the area of coronary intervention, where the technique offers significant advantages over more widespread intravascular diagnostic techniques such as intravascular ultrasound. Its higher resolution permits to recognize periprocedural complications, such as microdissection of the coronary artery, stent malapposition, and neointimal hiperplasia, making this tool one of the most promising techniques in the intravascular diagnosis.


Subject(s)
Humans , Coronary Artery Disease/pathology , Coronary Stenosis/pathology , Plaque, Atherosclerotic/pathology , Tomography, Optical Coherence , Coronary Artery Disease/surgery , Coronary Stenosis/surgery , Plaque, Atherosclerotic/surgery , Recurrence , Severity of Illness Index , Stents , Tomography, Optical Coherence/methods
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