Estudo do desempenho sistolico e diastolico do miocardio ventricular esquerdo em adultos obesos, pelo Doppler pulsado tecidual / Study of the systolic and diastolic behavior of the left myocardial ventricle in obese individuals by means of pulse - wave tissue Doppler

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The aim of this study is to analyze the left ventricular (LV) myocardial behavior in obese individuais, with or without hypertension, associating it (or not) with hypertrophy by means of pulse-wave tissue Doppler (pTD). The seven constitutive groups of this study were formed by 20 subjects each, including men and women whose age ranged between 30 and 50 years and were divided as follows: Non-obeses (Group I : no High Blood Pressure (HPB) an hypertrophy), (Group ll: with HPB and no hypertrophy), (Group ill: with HBP and hypertrophy) and obeses (Group IV: normotensive and hypertrophy), (Group V: normotensive and hypertrophy), (Group VI : with HBP and no hypertrophy) (Group Vll: obese with HBP and hypertrophy). individuais diagnosed with diabetes, nephropathy or with thyroid, coronary, myocardial or valve problems, through anamnesis, physicaI examination, electrocardiography, echocardiography and DPT, as well as through specific laboratory tests, were excluded. Subjects were considered obese when Body Mass Index (BMI)? 30 Kg/m2; hypertensive when HBP if BP;? 140/90; hypertrophic: non-obese had Left Ventricular Mass (LVM) indexed to body surface (men>134 and women>110) and obese had LVM indexed to height2.7 (men>49.2 and women>46.7). Compared groups (I x IV) (I x V) (lI x VI) and (m x VII). Carried out analyses: clinical and cardiac characteristics of each group: BMI, age, gender, blood pressure (systolic, diastolic, mean), interventricular sept, posterior wall, diastolic diameter, relative thickness of posterior wall, L VM., sistolic function (ejection fractions) and diastolic function ( proceeding from the Transmitral Doppler and isovolumetric relaxation time); cardiac function through PTD at the myocardiallevel through the systolic velocity (Sm) and diastolic velocity (Em and Am) of the septal walls (WS) - inferior (WI), anterior (WA), lateral (WL), posterior (WP) - in the medial and basal regions. Statistical analysis was conducted through ANOV A and Tukey test and showed significant alteration (P<0.05) among the groups of interest, mainly in Em basal (Em-B) on WI, WS and WP. Pearson s correlation bases were: for Em-B WP: BMI (r= -0.56 ), L VM (r= -0.53) and age (r= - 0.31); for Em-B WI: BMI (r= - 0.44 ), L VM (r= - 0.52 ) and age (r= - 0.31 ) and for Em-B WP: BMI (r= -0.59 ). L VM (r= - 0.47) and age (r= - 0.25) with p<0.05 for ali the correlations. Multivariate linear regression showed p<0.05: for Em-B WP related to BMI, LVM and age: fl = 0.5109 ; for Em-B WI related to BMI, LVM and age: fl = 0.4277 and for Em-B WP related to BMI, L VM and age: fl = 0.4710. PIain linear regression showed: for Em-B WS: BMI (fl= 30,8%), LVM (r2 28,6%) and age (fl= 9.8%), for Em-B WI: BMI (r= 20.7%), LVM (r2= 27.5%) and age (r= 9.6%) and for Em-B WP: BMI (.-2= 34,2%), LVM (r= 22.5%) and age (r= 6.1%) with p<0.05 for alI the relations. The obesity can modify the basal diastolic behavior of the walls septal, inferior and posterior of the left myocardium ventricle, in normotensives or hypertensives individuais, associates or not with hypertrophy

ASSUNTO(S)

hipertrofia echocardiography hipertensão hypertension obesidade obesity ecocardiografia doppler doppler hypertrophy

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