IS THE PEAK-TO-MEAN PRESSURE GRADIENT RATIO USEFUL FOR ASSESSMENT OF AORTIC VALVE PROSTHESIS OBSTRUCTION?

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ESMAEILZADEH MARYAM; MIRDAMADI A.; PARSAEI MOZHGAN; SADEGHPOUR ANITA; MALEKI MAJID; BAKHSHANDEH ABKENAR H.

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Journal: THE JOURNAL OF TEHRAN UNIVERSITY HEART CENTER Year:2010 | Volume:5 | Issue:2 Page(s): 69-73

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Title

IS THE PEAK-TO-MEAN PRESSURE GRADIENT RATIO USEFUL FOR ASSESSMENT OF AORTIC VALVE PROSTHESIS OBSTRUCTION?

Author(s)

Keywords

AORTIC VALVE

DIAGNOSIS

ECHOCARDIOGRAPHY

DOPPLER

Abstract

Background: The evaluation of prosthetic valves is very difficult with two-dimensional transthoracic ECHOCARDIOGRAPHY alone. DOPPLER and color flow imaging as well as transesophageal ECHOCARDIOGRAPHY are more reliable to detect prosthetic valve dysfunction. However, DOPPLER study sometimes tends to be misleading due to the load-depending characteristics of peak and mean pressure gradients. The peak-to-mean pressure decrease ratio is a load-independent measure, which was previously used for the detecting and grading of AORTIC VALVE stenosis. We assessed the usefulness of this method for the evaluation of AORTIC VALVE prosthesis obstruction.Methods: One hundred fifty-four patients with AORTIC VALVE prostheses were included in this study. Trans thoracic and transesophageal echocardiographic examinations were performed in all the patients. Peak velocity and velocity time integral of the AORTIC VALVE and left ventricular outflow tract, peak and mean AORTIC VALVE pressure gradients, peak-to-mean pressure gradient ratio, and time velocity integral (TVI) index were measured.Results: There was a significant relation between the TVI index (p value < 0.001) and aortic prosthesis obstruction. A TVI index < 0.2 had a sensitivity of 71% and specificity of 100% for the detection of AORTIC VALVE prosthesis obstruction. However, no significant relation was found between the peak-to-mean pressure ratio and AORTIC VALVE prosthesis obstruction (p value=0.09).Conclusion: Although the peak-to-mean pressure gradient (PG/MG) ratio is a simple, quick, and load-independent method which may be useful for the grading of AORTIC VALVE stenos is, it is poorly associated with AORTIC VALVE prosthesis obstruction. The TVI index is a useful measure for the detection of aortic prosthesis obstruction.

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APA: Copy

ESMAEILZADEH, MARYAM, MIRDAMADI, A., PARSAEI, MOZHGAN, SADEGHPOUR, ANITA, MALEKI, MAJID, & BAKHSHANDEH ABKENAR, H.. (2010). IS THE PEAK-TO-MEAN PRESSURE GRADIENT RATIO USEFUL FOR ASSESSMENT OF AORTIC VALVE PROSTHESIS OBSTRUCTION?. THE JOURNAL OF TEHRAN UNIVERSITY HEART CENTER, 5(2), 69-73. SID. https://sid.ir/paper/301958/en

Vancouver: Copy

ESMAEILZADEH MARYAM, MIRDAMADI A., PARSAEI MOZHGAN, SADEGHPOUR ANITA, MALEKI MAJID, BAKHSHANDEH ABKENAR H.. IS THE PEAK-TO-MEAN PRESSURE GRADIENT RATIO USEFUL FOR ASSESSMENT OF AORTIC VALVE PROSTHESIS OBSTRUCTION?. THE JOURNAL OF TEHRAN UNIVERSITY HEART CENTER[Internet]. 2010;5(2):69-73. Available from: https://sid.ir/paper/301958/en

IEEE: Copy

MARYAM ESMAEILZADEH, A. MIRDAMADI, MOZHGAN PARSAEI, ANITA SADEGHPOUR, MAJID MALEKI, and H. BAKHSHANDEH ABKENAR, “IS THE PEAK-TO-MEAN PRESSURE GRADIENT RATIO USEFUL FOR ASSESSMENT OF AORTIC VALVE PROSTHESIS OBSTRUCTION?,” THE JOURNAL OF TEHRAN UNIVERSITY HEART CENTER, vol. 5, no. 2, pp. 69–73, 2010, [Online]. Available: https://sid.ir/paper/301958/en

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