Study suggests better canine RV imaging with convex probe and contrast: full analysis

A newly published study in Veterinary Radiology & Ultrasound adds evidence that probe choice, and the use of contrast, can improve echocardiographic assessment of the canine right ventricle. In 10 healthy beagle dogs, researchers compared three approaches, sector transducer, convex transducer, and contrast-enhanced convex transducer, and reported better myocardial visualization with the convex probe and more reliable right ventricular fractional area change measurements when contrast was added. (pmc.ncbi.nlm.nih.gov)

That matters because the right ventricle has long been one of the harder chambers to evaluate well on echocardiography. Its complex geometry, heavy trabeculation, and anterior, retrosternal position make standard two-dimensional measurements less straightforward than comparable left-sided assessments. Even in human cardiology, RV evaluation is recognized as technically challenging, and fractional area change is used because it offers a practical two-dimensional estimate of systolic function despite those limitations. (pubmed.ncbi.nlm.nih.gov)

In veterinary cardiology, the challenge is similar. Prior canine studies have established repeatability and reference intervals for RV systolic indices such as TAPSE, tissue Doppler S’, strain, and FAC, but they’ve also underscored that image quality and acquisition technique influence what can be measured reliably. More recent work in dogs with pulmonary stenosis has shown that RV free-wall thickness and other right-heart variables can track disease severity, reinforcing the clinical value of getting these measurements right. (pubmed.ncbi.nlm.nih.gov)

Against that backdrop, the new paper tested whether a convex transducer, with and without contrast enhancement, could address some of the RV’s known imaging blind spots. According to the study summary, the authors found improved myocardial visualization versus a sector transducer, and better precision for RVFAC with contrast-enhanced convex imaging. The benefit was especially relevant for near-field lesions and complex myocardial abnormalities, where border definition is often the limiting factor. The study was prospective and observational, but small, involving only 10 healthy beagles, so its results should be viewed as technique-focused rather than immediately generalizable across breeds or disease states. (pmc.ncbi.nlm.nih.gov)

The findings also align with broader imaging literature outside veterinary medicine. Human echocardiography studies have shown that contrast enhancement can improve RV endocardial border visualization and produce more accurate, more reproducible measurements of RV size and function, particularly when baseline image quality is suboptimal. In that sense, the veterinary study doesn’t just introduce a niche technical tweak, it supports a broader principle that better border definition can materially improve right-heart quantification. (pubmed.ncbi.nlm.nih.gov)

Why it matters: For veterinary professionals, the practical takeaway is that some of the variability in RV assessment may be modifiable at the image-acquisition stage. If convex probes and contrast-enhanced imaging improve visualization of the RV free wall and endocardial borders, clinicians may be able to generate more dependable measurements of wall thickness and RVFAC, two parameters that can influence interpretation in dogs with suspected right-sided remodeling or dysfunction. That’s potentially useful in referral cardiology and advanced imaging settings, where subtle changes in RV structure or function can shape case assessment, monitoring, and communication with pet parents. (pmc.ncbi.nlm.nih.gov)

There are still clear limits. This was a healthy-dog study, not a clinical outcomes study, and it did not establish that contrast-enhanced convex imaging changes diagnosis, treatment decisions, or prognosis. It also doesn’t settle questions around cost, workflow, training, or when contrast use is justified in routine practice. But it does give veterinary imagers a stronger evidence base for considering transducer selection as more than a hardware preference when the right ventricle is the structure of interest. (pmc.ncbi.nlm.nih.gov)

What to watch: The most important next development will be validation in dogs with naturally occurring cardiac disease, across breeds and body sizes, and ideally in studies that compare whether improved RV visualization translates into better diagnostic agreement or clinical decision-making. (pmc.ncbi.nlm.nih.gov)