Regurgitant jet evaluation using three-dimensional echocardiography and magnetic resonance

The Annals of Thoracic Surgery
Joerg AlbersChristian F Vahl

Abstract

Three-dimensional assessment of regurgitant jet volume is the prerequisite for stratifying valve insufficiency. However, systematic comparison of three-dimensional methods is lacking. Therefore, we evaluated magnetic resonance imaging and three-dimensional echocardiography experimentally. An insufficiency chamber (22 x 18.5 x 27 cm; ostia 10, 16, and 20 mm; regurgitant volumes 2.3 to 25 mL) within experimental circulation (BioMedicus pump, tubes, pulsatile flow 0.2 to 1.9 L/min) was used for three-dimensional echocardiography (HP Sonos 2500) and magnetic resonance imaging (Siemens Magnetom Vision). Doppler flowmeter served as a gold standard. Segmentation used thresholding and surface integration of velocity vectors. Jet volume was evaluated qualitatively by polynom fitting. Jet volume calculated by magnetic resonance (r = 0.99, p < 0.0001) and by echocardiography (r = 0.99, p < 0.0001) correlated identically to the gold standard. Jet volume derived from imaging correlated with each other by r = 0.98 (p < 0.0001). Polynom fits indicated a more paraboloid shape of magnetic resonance jet volume. Experimentally, three-dimensional echocardiography and magnetic resonance imaging possess identical accuracy for determining regurgitant...Continue Reading

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Citations

Apr 12, 2007·Der Chirurg; Zeitschrift für alle Gebiete der operativen Medizen·M R HodaR De Simone
May 20, 2009·Circulation·I AbouliatimA Leguerrier
May 26, 2006·Circulation Journal : Official Journal of the Japanese Circulation Society·Kye Hun KimJung Chaee Kang

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