Left ventricular geometry and function in patients with essential hypertension and microalbuminuria
作者:
Roberto Pontremoli,
Maura Ravera,
Gian Bezante,
Francesca Viazzi,
Clizia Nicolella,
Valeria Berruti,
Giovanna Leoncini,
Massimo Sette,
Claudio Brunelli,
Cinzia Tomolillo,
Giacomo Deferrari,
期刊:
Journal of Hypertension
(OVID Available online 1999)
卷期:
Volume 17,
issue 7
页码: 993-1000
ISSN:0263-6352
年代: 1999
出版商: OVID
关键词: cardiovascular risk;hypertension;left ventricular function;left ventricular hypertrophy;microalbuminuria;peripheral vascular disease
数据来源: OVID
摘要:
BackgroundMicroalbuminuria has recently emerged as a strong, independent predictor of cardiovascular mortality in patients with essential hypertension, yet the pathophysiological mechanisms underlying this association remain to be elucidated.ObjectiveTo study the relationship between microalbuminuria and left ventricular geometry and function and extra-cardiac vascular changes in a group of 211 untreated hypertensive patients.MethodsAlbuminuria was evaluated as albumin-tocreatinine ratio in three non-consecutive first morning urine samples. Left ventricular mass index and function were assessed by M-B mode echocardiography and carotid wall thickness by high-resolution ultrasound scan.ResultsThe prevalences of microalbuminuria and left ventricular hypertrophy were 14 and 47% respectively. Patients in the top quartile of albuminuria showed a higher left ventricular mass index (57 ± 1.8, 55 ± 2, 47 ± 1.4 and 48 ± 1.6 g/m2:7, respectively;P< 0.0001) as well as a higher prevalence of left ventricular hypertrophy (72, 65, 26 and 25%, respectively;P< 0.001) and especially concentric hypertrophy (56, 47, 17 and 21%, respectively;P< 0.0001) in the four quartiles of albuminuria. Microalbuminuric patients showed depressed left ventricular performance as indicated by a reduced midwall fractional shortening (15.7 ± 0.3, 15.9 ± 0.3, 16.7 ± 0.4 and 16.8 ± 0.3%, respectively;P< 0.02). Furthermore patients in the top quartile of albuminuria showed increased carotid wall thickness as compared to normoalbuminuric patients (0.78 ± 0.03, 0.7 ± 0.04, 0.65 ± 0.03 and 0.6 ± 0.03 mm, respectively;P< 0.001).ConclusionsHypertensive patients with microalbuminuria show a higher prevalence of unfavourable left ventricular geometric patterns, depressed left ventricular function and early signs of extra-cardiac vascular damage. These findings strengthen the role of microalbuminuria as an indicator of subclinical cardiovascular disease and may account for the worse outcome that is usually associated with increased urinary albumin excretion in essential hypertension.
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