Color Doppler detection of multiple ventricular septal defects

Area of Science:

• Pediatric Cardiology
• Diagnostic Imaging
• Echocardiography

Background:

• Isolated perimembranous ventricular septal defects (VSDs) are often accurately detected by combined 2D and Doppler echocardiography.
• Muscular or multiple VSDs can be challenging to diagnose noninvasively, particularly in older children, often requiring angiography.

Purpose of the Study:

• To compare the diagnostic accuracy of 2D color flow mapping with standard 2D/Doppler imaging for detecting single and multiple VSDs.
• To evaluate the effectiveness of these echocardiographic techniques against four-chamber left ventricular angiography.

Main Methods:

• Fifty-one patients (3 months to 25 years) with VSDs (solitary or multiple) and a control group with intact septa were studied.
• Two-dimensional color flow mapping and standard 2D/Doppler echocardiography were performed.
• Results were compared with four-chamber left ventricular angiography findings.

Main Results:

• Color Doppler and 2D/Doppler detected all VSDs proven by angiography, with no false positives.
• Sensitivity for multiple VSDs was 72% for color Doppler versus 38% for 2D/Doppler (both 100% specificity).
• Color Doppler identified additional small muscular VSDs missed by standard imaging, though it missed multiple VSDs in five patients (under specific conditions).

Conclusions:

• Color Doppler echocardiography demonstrates superior sensitivity for detecting multiple ventricular septal defects compared to standard 2D/Doppler.
• This technique is valuable for identifying VSDs, including small muscular defects, enhancing noninvasive diagnostic capabilities in pediatric cardiology.