RESUMO
A left ventricular (LV) free wall rupture is a highly lethal condition. A 78-year-old female, who collapsed while riding a bike, was admitted to our emergency service 7 days after experiencing chest pain. During admission, she had cardiopulmonary arrest. Though cardiopulmonary resuscitation was successful, computed tomography (CT) showed cardiac tamponade. Emergency surgery was then performed. Pericardiotomy revealed a postinfarction blowout rupture of an aneurysm (2 × 3 × 1 cm) on the anterolateral wall of the LV. The top of the aneurysm had a 2-mm wide blowing blood column. Intra-aortic balloon pumping was initiated. An off-pump multilayered sutureless repair using squares of collagen fleece with fibrinogen-based impregnation (i.e., TachoComb) and gelatin-resorcin-formalin glue (GRF glue) was performed. Postoperative coronary angiography revealed occlusion of the second diagonal branch. The patient was free from re-rupture or aneurysm enlargement. An LV blowout rupture, which was caused by myocardial infarction with a limited tear and necrotic area at the second diagonal branch territory, was successfully treated with an off-pump multilayered sutureless repair by using a TachoComb and GRF glue patch. The thickness of the hemostatic material seemed to help control the bulging of the aneurysm and to prevent further LV aneurysm enlargement and re-rupture.
Assuntos
Aneurisma Roto/cirurgia , Aprotinina/uso terapêutico , Procedimentos Cirúrgicos Cardíacos , Fibrinogênio/uso terapêutico , Formaldeído/uso terapêutico , Gelatina/uso terapêutico , Aneurisma Cardíaco/cirurgia , Ruptura Cardíaca Pós-Infarto/cirurgia , Técnicas Hemostáticas , Resorcinóis/uso terapêutico , Trombina/uso terapêutico , Adesivos Teciduais/uso terapêutico , Idoso , Aneurisma Roto/diagnóstico , Aneurisma Roto/etiologia , Tamponamento Cardíaco/etiologia , Tamponamento Cardíaco/cirurgia , Ponte Cardiopulmonar , Reanimação Cardiopulmonar , Angiografia Coronária , Combinação de Medicamentos , Feminino , Aneurisma Cardíaco/diagnóstico , Aneurisma Cardíaco/etiologia , Ruptura Cardíaca Pós-Infarto/diagnóstico , Ruptura Cardíaca Pós-Infarto/etiologia , Humanos , Técnicas de Sutura , Tomografia Computadorizada por Raios X , Resultado do TratamentoRESUMO
An aqueous solution of photocrosslinkable chitosan containing azide groups and lactose moieties (Az-CH-LA) incorporating paclitaxel formed an insoluble hydrogel within 30 s of ultraviolet light (UV) irradiation. The chitosan hydrogel showed strong potential for use as a new tissue adhesive in surgical applications and wound dressing. The fibroblast growth factor (FGF)-2 molecules retained in the chitosan hydrogel and in an injectable chitosan/IO(4)-heparin hydrogel remain biologically active, and were gradually released from the hydrogels as they biodegraded in vivo. The controlled release of biologically active FGF-2 molecules from the hydrogels caused induction of angiogenesis and collateral circulation occurred in healing-impaired diabetic (db/db) mice and in the ischemic limbs of rats. Paclitaxel, which is an antitumor reagent, was also retained in the chitosan hydrogel and remained biologically active as it was released on degradation of the hydrogel in vivo. The chitosan hydrogels incorporating paclitaxel effectively inhibited tumor growth and angiogenesis in mice. The purpose of this review is to describe the effectiveness of chitosan hydrogel as a local drug delivery carrier for agents (e.g., FGF-2 and paclitaxel) to control angiogenesis. It is thus proposed that chitosan hydrogel may be a promising new local carrier for drugs such as FGF-2 and paclitaxel to control vascularization.
