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Updated: Apr 20, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
Published on: March 21, 2013
[Platypnea-orthodeoxia revealed by recurrent syncope episodes]
Platypnea-orthodeoxia, a rare condition often linked to patent foramen ovale, causes fainting and shortness of breath when standing. Surgical closure of the foramen ovale provides lasting symptom relief.
Area of Science:
- Cardiology
- Pulmonology
- Medical Diagnostics
Background:
- Platypnea-orthodeoxia is a rare syndrome characterized by dyspnea and faintness exacerbated by the upright position.
- It is frequently associated with an interatrial communication, most commonly a patent foramen ovale (PFO).
- The underlying pathophysiology is complex and multifactorial, often requiring specific anatomical criteria.
Observation:
- Patients present with positional dyspnea and orthostatic syncope.
- Contrast echocardiography is the gold standard for diagnosing platypnea-orthodeoxia and identifying associated PFO.
- The condition necessitates consideration in differential diagnoses for unexplained positional symptoms.
Findings:
- A patent foramen ovale is a common finding in platypnea-orthodeoxia syndrome.
- Diagnosis is confirmed through contrast echocardiography, visualizing shunting in the upright position.
- Multiple anatomical factors likely contribute to the syndrome's manifestation.
Implications:
- Transcatheter closure of the patent foramen ovale is the preferred therapeutic intervention.
- Successful PFO closure leads to rapid and sustained clinical improvement.
- This highlights the importance of recognizing and treating platypnea-orthodeoxia for patient well-being.
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