JACC
HOME SUBSCRIPTIONS CURRENT ISSUE PAST ISSUES CARDIOSOURCE SEARCH HELP FEEDBACK
QUICK SEARCH:   [advanced]


     

J Am Coll Cardiol, 2007; 49:1880-1886, doi:10.1016/j.jacc.2007.01.077 (Published online 19 April 2007).
© 2007 by the American College of Cardiology Foundation
This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wu, M.-T.
Right arrow Articles by Yang, T.-L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Wu, M.-T.
Right arrow Articles by Yang, T.-L.

Influence of Pulmonary Regurgitation Inequality on Differential Perfusion of the Lungs in Tetralogy of Fallot After Repair

A Phase-Contrast Magnetic Resonance Imaging and Perfusion Scintigraphy Study

Ming-Ting Wu, MD*,{dagger},*, Yi-Luan Huang, MD*,{dagger}, Kai-Sheng Hsieh, MD{ddagger}, Ju-Tung Huang, MD*,{ddagger}, Nan-Jing Peng, MD*,§, Jun-Yen Pan, MD*,||, Jer-Shyung Huang*,{dagger},¶ and Tsung-Lung Yang*,{dagger},¶

* Faculty of Medicine, School of Medicine, National Yang Ming University, Taipei, Taiwan
{dagger} Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
{ddagger} Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
§ Department of Nuclear Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
|| Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
Shu Zen College of Medicine and Management, Kaohsiung, Taiwan.


Figure 1
View larger version (76K):
[in this window]
[in a new window]
[Download PPT slide]
  		Figure 1 Example Case

Example case showing differential lung perfusion estimated by phase-contrast magnetic resonance imaging (MRI) and perfusion scintigraphy. (A) Left, magnitude image of right pulmonary artery (RPA) (arrow) at cross-sectional plane; middle, magnitude image of left pulmonary artery (LPA) (arrow); right, phase-contrast image of LPA at systole with forward flow (upper), encoded white color (arrowhead), and at diastole with backward flow (lower), encoded black color (arrowhead). (B) Flow volume-time curve profile of left and right pulmonary arteries. S, D, correspond to phase-contrast images at systole and diastole in (A), respectively. (C) 99mTc-labeled macroaggregates of albumin perfusion scintigraphy, posterior-anterior view. The L% was 32%. Note that estimation by net flow volume ratio resulted in an underestimation of left lung perfusion as much as –19%. (D) Bar chart showing the phase-contrast MRI measurements of absolute flow volume and differential perfusion of left lung (L%) and right lung (R%) calculated on the basis of forward flow, backward flow, and net flow volume, respectively. AA = ascending aortal; DA = descending aorta; LA = left atrium; LV = left ventricle; PA = pulmonary artery; RF = regurgitation fraction = backward flow volume divided by forward flow volume; RR = cardiac beat-to-beat interval.0

 

Figure 2
View larger version (11K):
[in this window]
[in a new window]
[Download PPT slide]
  		Figure 2 Discrepancy of L% Measurement

Bland-Altman plots of differential perfusion of the left lung (L%) measured by phase-contrast magnetic resonance imaging flow versus perfusion scintigraphy (PS). FFV = forward flow volume; MR = magnetic resonance; NFV = net flow volume.

 

Figure 3
View larger version (11K):
[in this window]
[in a new window]
[Download PPT slide]
  		Figure 3 Effect of Regurgitation Fraction on Discrepancy of L% Measurement

Scatterplot of regurgitation fraction of left pulmonary artery versus discrepancy between L% calculated by phase-contrast magnetic resonance imaging (PC-MRI) flow and PS. Abbreviations as in Figure 2.

 

Figure 4
View larger version (18K):
[in this window]
[in a new window]
[Download PPT slide]
  		Figure 4 Distribution of Regurgitation Fraction in the Vessels In-Pair

Distribution of regurgitation fraction in the 4 vessels in pair of the 16 cases receiving additional lower-lung phase-contrast magnetic resonance (MR) imaging scan. LDPA = left descending pulmonary artery; LPA = left pulmonary artery; RDPA = right descending pulmonary artery; RPA = right pulmonary artery.

 




HOME SUBSCRIPTIONS CURRENT ISSUE PAST ISSUES CARDIOSOURCE SEARCH HELP FEEDBACK
Copyright © 2007 by the American College of Cardiology Foundation.