Loading…
Logo Catalog

主动脉瘤和主动脉夹层

Display this animation on your web site today! Click to find out how.
ID: ANH12061chis
医学动画文字记录:主动脉是人体最大的动脉。心脏通过主动脉泵出新鲜的含氧血液,将氧气和营养输送到所有的器官和组织。主动脉分为两个主要部分,胸主动脉和腹主动脉。胸主动脉由四部分组成:主动脉根部、升主动脉、主动脉弓和降主动脉。主动脉壁由三层组成,即内膜或内层、中膜或中层和外膜或外层。弹性肌肉层可防止血液压力导致的管壁破裂。随着时间的推移,退行性疾病可能会导致中膜破裂,使主动脉壁变薄。血液泵向薄弱的区域可能会导致它像气球一样向外膨胀。当这种情况发生在胸部时,称为胸主动脉瘤。这些动脉瘤可发生在以下几处动脉之一,包括主动脉根部、升主动脉或降主动脉。大多数胸主动脉瘤没有症状,但当动脉瘤比较大时,就会出现各种症状,这取决于动脉瘤的严重程度和位置。稳定型胸主动脉瘤的症状包括呼吸短促、胸痛、背痛或腹痛、吞咽困难和声音嘶哑。如果动脉瘤破裂或发生动脉夹层,会出现更严重的症状,包括胸部撕裂感、肩胛区(肩胛骨之间的背部)剧烈疼痛、头晕、行走和说话困难。如果你出现这些症状,应该立即就医,因为这种情况是危及生命的。血液泵向薄弱的主动脉壁会导致另一种危及生命的情况,称为主动脉夹层,这种情况可能发生在动脉瘤内,也可能不会发生在动脉瘤内。最常见的主动脉夹层开始于内膜层的损伤。血液在内膜的缝隙中流动,将其与中膜分开,导致主动脉内壁出血。因此,在真主动脉管道和假主动脉管道之间形成了一个称为隔膜的瓣。从这里,血液可能会冲破主动脉壁的外层,立即危及生命,也可能会通过内膜的另一个裂口重新进入主动脉。随着时间的推移,假管道中可能会形成血块。主动脉夹层可根据其位置和症状持续时间进行分类。在Stanford分型中,如果升主动脉出现了主动脉夹层,称为A型夹层。所有其他的夹层称为B型。胸主动脉夹层最常见的症状是尖锐痛或刺痛,通常是突然和严重的胸痛。如果是A型夹层,最可能感到疼痛的部位是胸部。如果是B型夹层,更有可能感觉到背部疼痛,而不是胸部疼痛。如果你有这些症状,应该立即就医,因为这种情况可能会危及生命。

Nucleus Medical Media Disclaimer of Medical and Legal Liability

Nucleus Medical Media ("Nucleus") does not dispense medical or legal advice, and the text, illustrations, photographs, animations and other information ("Content") available on this web site is for general information purposes only. As with any medical or legal issue, it is up to you to consult a physician or attorney for professional advice. YOU SHOULD NOT DISREGARD PROFESSIONAL MEDICAL OR LEGAL ADVICE BASED ON CONTENT CONTAINED ON THIS WEB SITE, NOR SHOULD YOU RELY ON THE CONTENT ON THIS WEB SITE IN PLACE OF PROFESSIONAL MEDICAL OR LEGAL ADVICE.

NUCLEUS DISCLAIMS ALL RESPONSIBILITY AND LIABILITY FOR ANY COUNSEL, ADVICE, TREATMENT, DIAGNOSIS OR ANY MEDICAL, LEGAL OR OTHER INFORMATION, SERVICES OR PRODUCTS THAT YOU OBTAIN BASED ON VIEWING THE CONTENT OF THIS SITE. THE INFORMATION ON THIS WEB SITE SHOULD NOT BE CONSIDERED COMPLETE OR SUITABLE FOR ANY PURPOSE WHATSOEVER.

Mature Content Disclaimer: Certain Content on this web site contains graphic depictions or descriptions of medical information, which may be offensive to some viewers. Nucleus, its licensors, and its suppliers disclaim all responsibility for such materials.

close