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S Afr Med J ; 92(7): 532-6, 2002 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-12197195

RESUMO

OBJECTIVES: To assess, using ambulatory blood pressure monitoring (ABPM), the antihypertensive efficacy of hydrochlorothiazide 12.5 mg and indapamide 2.5 mg given as a monotherapy over 3 months to black patients with mild to moderate essential hypertension. DESIGN: Single-centre, prospective, randomised open pilot study in three phases: (i) 1-week drug-free washout period; (ii) 2-week placebo run-in phase; and (iii) 3-month prospective open-label active treatment period. RESULTS: Forty-two black patients with mean daytime diastolic BP (DBP) > or = 90 mmHg and < or = 115 mmHg (mean age 57 +/- 11 years, 28 women/14 men) were enrolled into the study. Overall, a profound and sustained BP reduction was achieved with indapamide at 3 months (N = 20). The 24-hour BP decreased from 150 +/- 17/94 +/- 6 mmHg to 130 +/- 19/82 +/- 9 mmHg (P < 0.0001 for systolic BP (SBP) and DBP at 3 months versus baseline); the mean daytime BP decreased from 155 +/- 15/98 +/- 6 mmHg to 134 +/- 18/87 +/- 10 mmHg (P < 0.0001 for SBP and DBP at 3 months versus baseline). The overall control (mean daytime DBP < 90 mmHg) and response (decrease in daytime DBP > or = 10 mmHg) rates achieved with indapamide were 10/20 (50%) and 13/20 (65%), respectively. In contrast, monotherapy with hydrochlorothiazide resulted in more modest BP reduction and control and response rates at 3 months (N = 22). The 24-hour BP decreased from 147 +/- 14/94 +/- 7 mmHg to 139 +/- 19/88 +/- 2 mmHg (P < 0.05 for DBP at 3 months versus baseline, P = NS for SBP); the mean daytime BP decreased from 151 +/- 14/98 +/- 5 mmHg to 144 +/- 16/93 +/- 10 mmHg (P < 0.05 for DBP at 3 months versus baseline, P = NS for SBP). The corresponding control and response rates were 7/22 (32%) and 8/22 (36%). Both hydrocholorothiazide and indapamide caused significant hypokalaemia. CONCLUSIONS: Monotherapy with indapamide is associated with greater BP reduction and control and response rates than monotherapy with low-dose hydrochlorothiazide and may be an appropriate choice of antihypertensive diuretic therapy in black South African patients with mild to moderate hypertension.


Assuntos
População Negra , Hidroclorotiazida/administração & dosagem , Hipertensão/tratamento farmacológico , Indapamida/administração & dosagem , Adulto , Idoso , Análise de Variância , Determinação da Pressão Arterial , Relação Dose-Resposta a Droga , Esquema de Medicação , Feminino , Seguimentos , Humanos , Hipertensão/diagnóstico , Hipertensão/etnologia , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Probabilidade , Estudos Prospectivos , Índice de Gravidade de Doença , África do Sul , Estatísticas não Paramétricas , Resultado do Tratamento
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