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4 results on '"W Andaya"'

1. Abstracts

Author

Edward G. Cape, Elias G. Skoufis, Robert A. Levine, Ajit P. Yoganathan, Irene Lang, G. Fenzl, M. Popow, S. Globits, A. Moritz, P. Probst, D. H. Glogar, J. Mlczoch, F. Kaindl, Nelson P. Daboin, Joel A. Strom, Michele Nanna, Robert W. M. Frater, E Mercer, M E Fawzy, B Dunn, M Al-Amri, W Andaya, P. Bubenheimer, L. Görnandt, E. Eschenbruch, P. Tollenaere, D. Birnbaum, H. Roskamm, A. G. Fraser, L A. van Herwerden, M. E. R. M. van Daele, J. R. T. C. Roelandt, G. R. Sutherland, W. Jaarsma, S. Reichert, C. Visser, M. J. Suttorp, F. Vermeulen, A. Moulijn, J. P. Godenir, J. F. Bruntz, M. Allaoui, B. Peiffert, J. Zamorano, J. P. Villemot, Heinz Lambertz, Frank A. Flachskampf, Carmine Minale, Peter Hanrath, E. Palsky, M. Romano, C. Carbone, Y. Hong Quan, G. Timsit, A. Lessana, Michael Drexler, Franz Metzger, Manfred Dahm, Raimund Erbel, Hellmut Oelert, and Jürgen Meyer

Subjects
Radiology, Nuclear Medicine and imaging, Cardiology and Cardiovascular Medicine
Published
1989

2. Doppler echocardiography in the evaluation of tricuspid stenosis

Author

W. Andaya, M. Al-Amri, B. Dunn, E. N. Mercer, and Mohamed Fawzy

Subjects
Adult, Male, medicine.medical_specialty, Cardiac Catheterization, medicine.medical_treatment, Diastole, Tricuspid stenosis, Blood Pressure, Doppler echocardiography, Postoperative Complications, Tricuspid Valve Insufficiency, Internal medicine, medicine, Humans, Mitral Valve Stenosis, Cardiac catheterization, Tricuspid valve, medicine.diagnostic_test, business.industry, Middle Aged, medicine.disease, Echocardiography, Doppler, Prosthesis Failure, medicine.anatomical_structure, Heart Valve Prosthesis, Tricuspid valve stenosis, Angiography, cardiovascular system, Cardiology, Female, Cardiology and Cardiovascular Medicine, business, Tricuspid Valve Stenosis
Abstract

Seventeen patients (12 with native and five with prosthetic tricuspid valves) with tricuspid stenosis were studied by Doppler echocardiography followed by cardiac catheterization within 24 h. The mean tricuspid diastolic pressure gradient was calculated using the modified Bernoulli equation. Tricuspid valve area (TVA) was calculated by the pressure half-time method (TVA = 190 divided by pressure half-time). Data from Doppler echocardiography and cardiac catheterization were compared. The Doppler-derived tricuspid mean diastolic gradient was 1.9-9.9 mmHg (average 5.3 +/- 2.5 mmHg), which correlated moderately well with the catheterization-determined mean diastolic gradient of 2-17 mmHg (average 7.3 +/- 4.0 mmHg), R = 0.74, standard error of the estimate (SEE) 1.70 mmHg, Y = 0.45 x + 2.00, P less than 0.001. The Doppler-derived TVA was 0.56-1.58 cm2 (average 1.06 +/- 0.32 cm2), which correlated well with the catheterization-determined TVA of 0.4-2.2 cm2 (average 1.06 +/- 0.46 cm2), R = 0.81, SEE = 0.20 cm2, Y = 0.56 x + 0.46, P less than 0.001. Of 12 patients undergoing right ventricular angiography, the angiographic and Doppler grades of tricuspid regurgitation matched exactly in six and differed by one grade in the remaining six. This study demonstrated that Doppler echocardiography compares very well to cardiac catheterization in the quantification of tricuspid stenosis and in the assessment of concomitant tricuspid regurgitation.

Published
1989

3. Hemodynamic evaluation of porcine bioprostheses in the mitral position by Doppler echocardiography.

Author

Fawzy ME, Halim M, Ziady G, Mercer E, Phillips R, and Andaya W

Subjects
Adult, Blood Pressure, Female, Humans, Male, Middle Aged, Mitral Valve Insufficiency physiopathology, Mitral Valve Stenosis physiopathology, Bioprosthesis, Cardiac Catheterization, Echocardiography, Heart Valve Prosthesis, Mitral Valve
Abstract

Twenty-four patients with porcine bioprostheses in the mitral position were studied by Doppler echocardiography followed by cardiac catheterization within 24 hours. Doppler mean diastolic mitral valve gradient was calculated by a 3-point method and mitral valve area was determined by the pressure half-time method. Data from Doppler echocardiography and cardiac catheterization were compared. There was a strong correlation between Doppler echocardiography and catheterization-determined mean diastolic gradient: r = 0.9, standard error of estimate (SEE) = 1.4 mm/Hg (regression equation y = 0.63x + 1.41), p less than 0.001. There was also a strong correlation between Doppler echocardiography and catheterization-determined mitral valve area: r = 0.86, SEE = 0.18 cm2 (regression equation y = 0.64x + 0.52), p less than 0.001. Fourteen patients whose valvular function was considered normal by clinical evaluation had Doppler-calculated mean diastolic gradients of 4.5 to 9.5 mm Hg (mean 6.5 +/- 1.4); the Doppler-determined valve area was 1.15 to 2.0 cm2 (mean 1.54 +/- 0.3). Ten patients had a malfunctioning bioprosthesis, 7 had severe mitral regurgitation and 3 had stenosis. Valvular malfunction in all 10 patients was detected by Doppler echocardiography and confirmed by catheterization and angiocardiography. Nine patients underwent reoperation. Doppler hemodynamic evaluation of porcine bioprostheses in the mitral position provided noninvasive information comparable to that obtained by cardiac catheterization.

Published
1987
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4. Doppler echocardiography in the evaluation of tricuspid stenosis.

Author

Fawzy ME, Mercer EN, Dunn B, al-Amri M, and Andaya W

Subjects
Adult, Blood Pressure, Female, Heart Valve Prosthesis, Humans, Male, Middle Aged, Mitral Valve Stenosis diagnosis, Mitral Valve Stenosis surgery, Postoperative Complications diagnosis, Prosthesis Failure, Tricuspid Valve Insufficiency diagnosis, Tricuspid Valve Stenosis surgery, Cardiac Catheterization, Echocardiography, Doppler, Tricuspid Valve Stenosis diagnosis
Abstract

Seventeen patients (12 with native and five with prosthetic tricuspid valves) with tricuspid stenosis were studied by Doppler echocardiography followed by cardiac catheterization within 24 h. The mean tricuspid diastolic pressure gradient was calculated using the modified Bernoulli equation. Tricuspid valve area (TVA) was calculated by the pressure half-time method (TVA = 190 divided by pressure half-time). Data from Doppler echocardiography and cardiac catheterization were compared. The Doppler-derived tricuspid mean diastolic gradient was 1.9-9.9 mmHg (average 5.3 +/- 2.5 mmHg), which correlated moderately well with the catheterization-determined mean diastolic gradient of 2-17 mmHg (average 7.3 +/- 4.0 mmHg), R = 0.74, standard error of the estimate (SEE) 1.70 mmHg, Y = 0.45 x + 2.00, P less than 0.001. The Doppler-derived TVA was 0.56-1.58 cm2 (average 1.06 +/- 0.32 cm2), which correlated well with the catheterization-determined TVA of 0.4-2.2 cm2 (average 1.06 +/- 0.46 cm2), R = 0.81, SEE = 0.20 cm2, Y = 0.56 x + 0.46, P less than 0.001. Of 12 patients undergoing right ventricular angiography, the angiographic and Doppler grades of tricuspid regurgitation matched exactly in six and differed by one grade in the remaining six. This study demonstrated that Doppler echocardiography compares very well to cardiac catheterization in the quantification of tricuspid stenosis and in the assessment of concomitant tricuspid regurgitation.

Published
1989
Full Text
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