Abstract
Article: A Novel Echocardiographic Marker (PDAM) Incorporating the Diameter of the Patent Foramen Ovale to Assess Hemodynamically Significant Patent Ductus Arteriosus
Authors: Joy D. Guthrie, PhD, RDMS, RDCS, RVT, RCS, RCCS, RVS, FSDMS
Category: Pediatric Echocardiography
Credit: 1.0 SDMS CME Credit
Objectives: After studying the article entitled “A Novel Echocardiographic Marker (PDAM) Incorporating the Diameter of the Patent Foramen Ovale to Assess Hemodynamically Significant Patent Ductus Arteriosus,” you will be able to:
Make the quantitative echocardiographic measurements needed to determine the proposed patent ductus arteriosus marker (PDAM)
Calculate the PDAM
Determine the clinical significance of the calculated PDAM
For this study, measurements for the left atrial/aortic root ratio (LA/Ao) were taken from the Subcostal short-axis view Suprasternal notch view Parasternal short-axis view Parasternal long-axis view
The diameter of a patent foramen ovale (PFO) was taken to be the larger measurement of what two views? Parasternal long axis and short axis Parasternal long axis and subcostal long axis Parasternal short axis and subcostal short axis Subcostal long axis and short axis
Reports in the literature have quoted a patent ductus arteriosus diameter of greater than or equal to ____ mm/kg body weight as significant. 1.2 1.4 1.6 2.0
Other reports in the literature have used a value of the ratio of left atrial diameter to aortic root diameter (LA/Ao) of approximately ____ as a marker for a significant PDA. 1.0 1.5 2.0 4.0
In the reported study, the mean PDA diameter in cases that required ligation was approximately ____ mm. 1.5 1.8 2.4 3.7
In the reported study, as the significance of a PDA increased from control subjects to PDAs needing ligation, the measured PFO diameter relative to body weight Increased systematically from group to group Decreased systematically from group to group Varied randomly Showed no change
The proposed new marker for a significant PDA is a combination of LVEF plus PFO diameter plus PDA diameter LVEF plus LA/Ao ratio plus PFO diameter PDA/LPA ratio plus LA/Ao ratio plus PFO diameter PDA/LPA ratio plus PDA diameter plus PFO diameter
The average for the PDA marker (PDAM) for subjects in whom it was necessary to ligate the PDA was approximately 6 5 4 3
Using a receiver operating characteristic curve, for cases with a PDA that needed ligation, a PDA marker score of 5.1 gave a sensitivity of approximately ____ %. 61 85 93 98
Using a receiver operating characteristic curve, for cases with a hemodynamically significant PDA, a PDA marker score of 4.1 gave a sensitivity of approximately ____ %. 61 85 93 98
Footnotes