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Platypnoea-orthodeoxia syndrome
1Department of Vascular Medicine, Princess Alexandra Hospital, Ipswich Road, Brisbane, Queensland, Australia, 4102.
Heart (British Cardiac Society)
|January 29, 2000
Summary
Platypnoea is a rare syndrome causing low blood oxygen (hypoxemia) and breathlessness when upright. Surgical closure of intracardiac shunts offers significant improvement for patients with this condition.
Area of Science:
- Cardiology
- Pulmonology
- Medical Diagnostics
Background:
- Platypnoea is a rare syndrome characterized by orthodeoxia (postural hypoxemia) and dyspnea.
- The condition involves right-to-left intracardiac shunting despite normal right-sided cardiac pressures.
Observation:
- Dyspnea predominantly occurs in an upright posture, which can be debilitating.
- Diagnosis requires careful evaluation of the patient's dyspnea pattern.
- Orthostatic desaturation can be confirmed by comparing erect and supine pulse oximetry readings.
Findings:
- Echocardiography, particularly with echocontrast and postural maneuvers, is the primary diagnostic tool for orthostatic intracardiac shunts.
- Surgical closure of the intracardiac communication, typically an interatrial defect, is the definitive treatment.
Implications:
- Surgical intervention can lead to dramatic symptomatic and hemodynamic improvements in patients with platypnoea.
- Understanding the diagnostic pathway and treatment options is crucial for managing this rare syndrome.
- Case studies highlight varied presentations, management strategies, and outcomes, aiding clinical awareness.