The role of isovolumic acceleration in predicting subclinical right and left ventricular systolic dysfunction in hypertensive obese patients.
Turk Kardiyol Dern Ars
; 39(1): 9-15, 2011 Jan.
Article
en En
| MEDLINE
| ID: mdl-21358225
ABSTRACT
OBJECTIVES:
Isovolumic acceleration assessed by tissue Doppler imaging has been proposed as a preload-independent indicator of left ventricular contractility. We investigated the utility of isovolumic acceleration in the prediction of preclinical right and left ventricular systolic dysfunction in hypertensive and obese subjects. STUDYDESIGN:
Seventy-eight obese subjects (BMI >30 kg/m2; 57 women, 21 men; mean age 51±8 years) were prospectively enrolled. Fifty patients (64.1%) had hypertension and 33 patients (42.3%) had diabetes mellitus. All the subjects were assessed by conventional and tissue Doppler echocardiography. Myocardial velocities of the left ventricular septal and lateral mitral annulus and lateral tricuspid annulus were determined. Isovolumic contraction wave was defined as the preceding wave of the systolic wave that began before the peak of the R wave on the electrocardiogram. Myocardial isovolumic acceleration was measured by dividing the peak velocity by the time passed from the onset of the wave (zero-crossing) during isovolumic contraction to the peak velocity of the wave.RESULTS:
Waist circumference was in positive correlation with left ventricular end-systolic (r=0.22, p=0.047) and end-diastolic (r=0.384, p=0.001) diameters, and in negative correlation with the peak systolic velocity of the tricuspid annulus (r=-0.311, p=0.006). Although hypertensive and normotensive (n=28) obese subjects had similar myocardial velocities, lateral tricuspid annular isovolumic acceleration (p=0.027), septal isovolumic acceleration (p=0.026), and septal isovolumic contraction myocardial velocity (p=0.018) were significantly lower in hypertensive patients.CONCLUSION:
Isovolumic acceleration and isovolumic contraction myocardial velocity analysis may be useful in the diagnosis of subclinical left and right ventricular dysfunction in hypertensive obese patients.
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Bases de datos:
MEDLINE
Asunto principal:
Disfunción Ventricular Derecha
/
Disfunción Ventricular Izquierda
/
Hipertensión
/
Contracción Miocárdica
/
Obesidad
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Turk Kardiyol Dern Ars
Asunto de la revista:
CARDIOLOGIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Turquía