Endoprosthesis implantation at the entry pathway of the right atrium monitored by intracardiac ultrasound.

Obstructions of the upper venous system may be due to spontaneous thrombosis or the presence of hemodialysis or chemotherapy catheters, or even the presence of extrinsic compression due to intra-thoracic tumors. The use of endoprosthesis for the treatment of these obstructions has become common practice, and its indications include situations of risk for pulmonary embolism, superior vena cava syndrome, and loss of vascular access. Within this context, the use of intracardiac ultrasound may be useful in evaluating the extension and severity of the obstructive lesion, besides providing important information about the mural and intraluminal morphology of the venous system. The authors report the case of a patient with superior vena cava syndrome caused by thrombosis at the entry pathway of the right atrium, besides discussing the subject by means of literature review.

Implante de endoprótese na via de entrada do átrio direito monitorado por ultra-som intracardíaco / Endoprosthesis implantation at the entry pathway of the right atrium monitored by intracardiac ultrasound

As obstruções do sistema venoso superior podem ocorrer por trombose espontânea ou na presença de cateteres de hemodiálise ou quimioterapia, e mesmo na presença de compressão extrínseca por tumores intratorácicos. O uso de endopróteses para o tratamento dessas obstruções vem se tornando prática comum e sua indicação inclui situações de risco de embolia pulmonar, síndrome da veia cava superior e perda do acesso vascular. Nesse contexto, o uso do ultra-som intracardíaco pode ser útil na avaliação da extensão e da gravidade da obstrução, além de fornecer informações morfológicas murais e intramurais do sistema venoso. Relatamos o caso de uma paciente com síndrome da veia cava superior por trombose da via de entrada do átrio direito, submetida a implante de endoprótese monitorado por ultra-som intracardíaco, além de discutir o tema por meio de revisão da literatura.

Obstructions of the upper venous system may be due to spontaneous thrombosis or the presence of hemodialysis or chemotherapy catheters, or even the presence of extrinsic compression due to intra-thoracic tumors. The use of endoprosthesis for the treatment of these obstructions has become common practice, and its indications include situations of risk for pulmonary embolism, superior vena cava syndrome, and loss of vascular access. Within this context, the use of intracardiac ultrasound may be useful in evaluating the extension and severity of the obstructive lesion, besides providing important information about the mural and intraluminal morphology of the venous system. The authors report the case of a patient with superior vena cava syndrome caused by thrombosis at the entry pathway of the right atrium, besides discussing the subject by means of literature review.