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Pseudo subaortic stenosis--a catheter-induced artifact
Insights
Multiholed catheters can create artifactual subvalvular chambers in patients with valvular aortic stenosis. This may obscure the detection of coexisting subvalvular aortic stenosis, complicating diagnosis.
Area of Science:
- Cardiology
- Medical Imaging
- Diagnostic Techniques
Background:
- Valvular aortic stenosis is a common cardiac condition.
- Coexistence of valvular and subvalvular aortic stenosis has been increasingly reported.
- Accurate diagnosis is crucial for appropriate patient management.
Observation:
- Artifactual subvalvular chambers were observed on pressure tracings in three patients with valvular aortic stenosis.
- These artifacts occurred during multiholed catheter withdrawal from the left ventricle to the aortic root.
- The presence of these artifacts potentially mimics subvalvular obstruction.
Findings:
- Multiholed catheters, commonly used for left ventricular entry in valvular aortic stenosis, are unsatisfactory for detecting coexisting subvalvular obstruction.
- The artifactual chambers can lead to misinterpretation of pressure tracings.
- This highlights a limitation in current diagnostic methods for complex aortic stenosis.
Implications:
- Clinicians should be aware of potential artifacts when interpreting pressure tracings in valvular aortic stenosis.
- Alternative or complementary diagnostic methods may be needed to accurately identify subvalvular obstruction.
- Improved diagnostic strategies are required for patients with combined valvular and subvalvular aortic stenosis.
Abstract:
Three cases are reported of valvular aortic stenosis in which artifactual subvalvular chambers were recorded on pressure tracings. The pressure tracings were obtained during withdrawal of multiholed catheters from the left ventricle to the aortic root. Several recent reports have described the coexistence of valvular and subvalvular aortic stenosis. The cases reported here re-emphasize that a multiholed catheter, which is the type commonly used for retrograde left ventricular entry in a patient with valvular aortic stenosis, is unsatisfactory for the detection of coexisting subvalvular obstruction.