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8th March 2024
A 19-year-old male has been experiencing intermittent dizzy spells over the last year and is seen in the Cardiology outpatient clinic.
A 19-year-old male has been experiencing intermittent dizzy spells over the last year and is seen in the Cardiology outpatient clinic. His exercise tolerance has been limited since childhood but has not been previously investigated. On examination, he is of short stature with finger clubbing and blue discolouration of his tongue and lips. A ‘murmur’ is heard on auscultation. Based on his cardiac catheterisation data presented below, what is the most likely diagnosis?
| Site | O2 Saturation (%) | Pressure (mmHg) (End systolic / End diastolic) |
|---|---|---|
| Superior Vena Cava | 55 | – |
| Right Atrium | 56 | Mean: 10 |
| Right Ventricle | 56 | 100/10 |
| Pulmonary Artery | 15/8 | |
| Pulmonary Capillary Wedge Pressure | – | Mean: 8 |
| Left Atrium | 98 | – |
| Left Ventricle | 85 | 110/8 |
| Ascending Aorta | 74 | 110/80 |
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