Patent Foramen Ovale Closure Without Echocardiographic Control: Use of "Standby" Intracardiac Ultrasound
David Hildick-Smith, MD, MRCP*,*,
Miles Behan, DM, MRCP*,
Peter Haworth, MRCP*,
Bushra Rana, MRCP ,
Martyn Thomas, MD, FRCP
* Sussex Cardiac Centre, Brighton and Sussex University Hospital NHS Trust, Brighton, United Kingdom
Department of Cardiology, King's College Hospital NHS Foundation Trust, London, United Kingdom.

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Figure 3 Long PFO Tunnel Demonstrated With Contrast Injection
(A) RA tunnel aperture; (B) LA aperture; (C) intracardiac echocardiography probe. PFO = patent foramen ovale; other abbreviations as in Figure 1.
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