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[Correlation of the transaortic gradient determined with doppler echocardiography versus catheterization in patients
J Illescas1, R Enciso, M Vidrio
1Departamento de Cardiología, Hospital de Especialidades, Centro Médico La Raza, IMSS.
Insights
Doppler echocardiography reliably estimates transaortic gradients in valvular aortic stenosis. This non-invasive method accurately diagnoses and monitors patients, correlating well with invasive cardiac catheterization.
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Valvular aortic stenosis (AS) requires accurate gradient assessment for management.
- Invasive cardiac catheterization is the gold standard but carries risks.
- Non-invasive methods are sought to reliably estimate transaortic gradients.
Purpose of the Study:
- To evaluate the reliability of non-invasive Doppler echocardiography for estimating transaortic gradients in valvular AS.
- To compare Doppler-derived gradients with invasive cardiac catheterization measurements.
Main Methods:
- Continuous-wave Doppler echocardiography was used to estimate transaortic gradients.
- Measurements were compared to invasive transvalvular gradients obtained via cardiac catheterization.
- Study included 30 consecutive patients diagnosed with valvular aortic stenosis.
Main Results:
- A strong correlation (r=0.83) was found between peak aortic jet velocity (Vmax) and catheterization-derived gradients.
- An excellent correlation (r=0.85) was observed between Doppler-estimated gradients and invasive measurements.
- Doppler echocardiography demonstrated high reliability in assessing transaortic gradients.
Conclusions:
- Doppler echocardiography provides a reliable, non-invasive method for calculating transaortic gradients in valvular AS.
- This technique facilitates accurate diagnosis and effective patient follow-up.
- Echocardiography offers a safe and effective alternative to invasive gradient measurements.
Abstract:
The purpose of this report is to evaluate the reliability of a non-invasive estimation of a transaortic gradient in patients with valvular aortic stenosis by doppler echocardiography. We compared the transvalvular gradients obtained by cardiac catheterization (invasive) versus the estimation by non-invasive technique such as continuous-wave doppler in 30 consecutive patients with valvular aortic stenosis. When compared the peak velocity (Vmax) of the aortic jet versus the gradient obtained by cardiac catheterization we found a correlation coefficient (r) of 0.83 and when compared the gradient obtained by both methods we found an r value of 0.85. These results show that the calculations of aortic gradient by echo-doppler, are reliable. Besides this method allowed us to establish the correct diagnosis and to follow up these patients.