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Sensitivity for detection of patent foramen ovale increased with increasing number of contrast injections: a descriptive study with contrast transesophageal echocardiography

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Authors
Johansson, Magnus C
Helgason, Hrodmar
Dellborg, Mikael
Eriksson, Peter
Issue Date
2008-05-01

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Citation
J Am Soc Echocardiogr. 2008, 21(5):419-24
Abstract
OBJECTIVE: We sought to study the diagnostic yield of increasing numbers of contrast injections for detection of patent foramen ovale (PFO) during transesophageal echocardiography. METHODS: Contrast was injected twice during each of 10 provocations to 30 patients screened for PFO. Injections were given during quiet respiration, early Valsalva (starting 3-5 seconds before injection), late Valsalva (starting 3-5 seconds after injection), Mueller maneuver, coughing, bed tilt during early Valsalva, after nitroglycerin spray during both quiet respiration, and early Valsalva. RESULTS: The number of detected PFOs increased as the number of injections increased (r = 0.79, P < .01). Five injections per patient detected all 11 large PFOs. To eventually detect all 14 PFOs among the 30 study patients required a total of 11 injections per patient. CONCLUSION: The sensitivity for PFO detection increased when additional contrast injections were given. At least 5 injections are required to safely detect or rule out the presence of a PFO.
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http://www.sciencedirect.com/science/article/B6WMB-4PVY2R1-4/1/25481976ec5a8bcaab06bbaa154a0444
ae974a485f413a2113503eed53cd6c53
10.1016/j.echo.2007.08.030
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