Relationship between microalbuminuria and cardiac structural changes in mild hypertensive patients
Braz. j. med. biol. res
;
35(7): 799-804, July 2002. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-316733
RESUMO
The aim of this study was to determine the relationship between urinary albumin excretion (UAE), cardiac structural changes upon echocardiography and 24-h ambulatory blood pressure (ABPM) levels. Twenty mild hypertensive patients (mean age 56.8 ± 9.6 years) were evaluated. After 2 weeks of a washout period of all antihypertensive drugs, all patients underwent an echocardiographic evaluation, a 24-h ABPM and an overnight urine collection. Systolic and diastolic blood pressure during 24-h ABPM was 145 ± 14/91 ± 10 mmHg (daytime) and 130 ± 14/76 ± 8 mmHg (nighttime), respectively. Seven (35 percent) patients presented UAE > or = 15 æg/min, and for the whole group, the geometric mean value for UAE was 10.2 x/÷ 3.86 æg/min. Cardiac measurements showed mean values of interventricular septum thickness (IVS) of 11 ± 2.3 mm, left ventricular posterior wall thickness (PWT) of 10 ± 2.0 mm, left ventricular mass (LVM) of 165 ± 52 g, and left ventricular mass index (LVMI) of 99 ± 31 g/m². A forward stepwise regression model indicated that blood pressure levels did not influence UAE. Significant correlations were observed between UAE and cardiac structural parameters such as IVS (r = 0.71, P<0.001), PWT (r = 0.64, P<0.005), LVM (r = 0.65, P<0.005) and LVMI (r = 0.57, P<0.01). Compared with normoalbuminuric patients, those who had microalbuminuria presented higher values of all cardiac parameters measured. The predictive positive and negative values of UAE > or = 15 æg/min for the presence of geometric cardiac abnormalities were 75 and 91.6 percent. These data indicate that microalbuminuria in essential hypertension represents an early marker of cardiac structural damage
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Albuminúria
/
Hipertensão
/
Miocárdio
Tipo de estudo:
Estudo de etiologia
/
Estudo prognóstico
/
Fatores de risco
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Braz. j. med. biol. res
Assunto da revista:
Biologia
/
Medicina
Ano de publicação:
2002
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal de Säo Paulo/BR
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