[Usefulness of the Doppler index delta P/delta t in the evaluation of left ventricular systolic dysfunction]. / Utilidad del índice Doppler delta P/delta t en la evaluación de la disfunción sistólica ventricular izquierda.
Rev Esp Cardiol
; 50(2): 105-10, 1997 Feb.
Article
en Es
| MEDLINE
| ID: mdl-9091996
ABSTRACT
INTRODUCTION AND OBJECTIVES:
It has been shown that the delta P/delta t index, derived from the continuous Doppler mitral regurgitation signal correlates strongly with dP/dt. This study evaluates the feasibility, reproducibility and correlation of the index with ejection fraction and other conventional echocardiographic parameters. MATERIAL ANDMETHODS:
One hundred and ten patients with mitral regurgitation demonstrated by colour Doppler were studied. delta P/delta t were calculated by the ratio between the interval of pression between two points of the Doppler signal (-1 and -3 m/s; 32 mmHg, applying the modified Bernouilli equation) and the interval of time (s) which separates both. Ejection fraction was measured in 70 patients by non-echocardiographic methods (isotopic ventriculography, n = 52, and angiography, n = 18).RESULTS:
The index was feasible in 91 cases, the variability of intra and interobserver was 5% and 7% respectively. The correlation between delta P/delta t and ejection fraction was significant although weak (r = 0.59; p < 0.001; n = 70). It was better in the group of dilated idiopathic myocardiopathy (r = 0.72; p < 0.001; n = 18) than in the group of myocardial infarction (r = 0.54; p < 0.01; n = 25). No significant correlation was founded in the cases with mitral rheumatic valvulopathy. Regarding to the echocardiographic parameters, the best correlation was obtained with end systolic diameter (r = -0.64; p < 0.001; n = 49). Finally, a value of delta P/delta t < 1,000 mmHg/s predicted the existence of left ventricular systolic dysfunction with high accuracy (84%), sensitivity (80%) and specificity (92%).CONCLUSIONS:
High feasibility when mitral regurgitation exists, adequate reproducibility and heightened precision in diagnosing left ventricular systolic dysfunction, are characteristics which make delta P/delta t useful in the echocardiographic routine practice.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Disfunción Ventricular Izquierda
/
Ecocardiografía Doppler en Color
Tipo de estudio:
Prognostic_studies
Límite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Es
Revista:
Rev Esp Cardiol
Año:
1997
Tipo del documento:
Article
País de afiliación:
Grenada