Chylopericardium is a rare complication of cardiac surgery. It may be caused by a lesion in the thoracic duct or its tributaries or by thrombosis in the confluence of the jugular and left subclavian veins, obstructing the drainage of the thoracic duct. The treatment may be conservative or surgical, depending on the duration and on the volume of the effusion. We report the case of a 24-year-old female, who, in the late postoperative period of mitral valve replacement (bioprosthesis), was hospitalized with cardiac tamponade due to the presence of chylopericardium. The clinical findings and treatment performed are discussed.

Currently several devices and techniques are created to reduce the complications associated with Percutaneous Coronary Intervention, such as post-stent restenosis. The Scaffold Vascular Bioresorbable (VHL) are among the devices developed for this purpose, representing a promising alternative in the treatment of coronary lesions, with the proposal of reduction of adverse events. Its mechanism of action promotes the restoration of blood flow in the implanted vessel, with subsequent resorption of the material. However, with its use on a larger scale, cases of thrombosis and restenosis of the treated site are being described. Thus, it is essential to report such cases, to make possible a greater clarification of the mechanisms involved in the complications and thus provide improvement of the technique and technology of the material, contributing to better outcomes in percutaneous revascularization.