Defecation syncope secondary to functional inferior vena caval obstruction during a valsalva maneuver

@article{Brophy1993DefecationSS,
  title={Defecation syncope secondary to functional inferior vena caval obstruction during a valsalva maneuver},
  author={Colleen Brophy and L Evans and Bauer E. Sumpio},
  journal={Annals of Vascular Surgery},
  year={1993},
  volume={7},
  pages={374-377}
}
This report describes a case of defecation syncope secondary to functional inferior vena cava (IVC) obstruction. Preoperative hemodynamic assessment revealed a marked decrease in blood pressure and IVC obstruction when the patient performed a Valsalva maneuver. The intraoperative approach included continuous hemodynamic monitoring as well as transesophageal ultrasonography to assess IVC patency during surgical mobilization of the IVC. Functional obstruction of the IVC at the diaphragmatic… 
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