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

  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},
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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  • L. Allan, E. Johns, M. Doshi, Rose Anne Kenny, J. Newton
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    Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology
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The results indicated that TCs indeed exist in inferior vena cava, which are a newly recognized compartment distinct from other interstitial cells in large veins.


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A case of spurious complete obstruction of the inferior vena cava in a 60-year-old man, which proved to be the result of a Valsalva maneuver is described.
Effect of Valsalva maneuver on the inferior vena cava in man.
The Valsalva maneuver did not appear to narrow the inferior vena cava significantly, either in its abdominal course or at the diaphra.
The Valsalva maneuver and response revisited.
Defecation Syncope: A Symptom With Multiple Etiologies
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The Valsalva maneuver: mechanisms and clinical implications.
Heart rate and total peripheral resistance continue to be increased during the immediate poststrain period, and the ejection of an increased stroke volume into a constricted arterial system produces a rapid and marked increase in arterial pressure--the phase IV overshoot with its subsequent slowing of heart rate.
A study on the Valsalva manoeuvre in young healthy subjects.