Hypertensive target organ damage and the risk for vascular events and all-cause mortality in patients with vascular disease
ABSTRACT OBJECTIVE:: Presence of hypertensive target organ damage is related to increased vascular risk and mortality. Whether combined presence of hypertensive target organ damage confers higher vascular risk compared to single presence is unknown. This study evaluates the separate and combined effects of impaired renal function [estimated glomerular filtration rate (eGFR) ≤60 ml/min per 1.73 m], albuminuria (albumin/creatinine-ratio men ≥2.5 mg/mmol, women ≥3.5 mg/mmol) and left-ventricular hypertrophy (LVH) (Sokolow-Lyon and/or Cornell-voltage criterion) on the occurrence of vascular events and mortality in patients with vascular disease (coronary artery disease, cerebrovascular disease, and peripheral arterial disease). METHODS AND RESULTS:: A cohort of patients with vascular diseases (n = 4319) was followed (median 4.4 years) for the occurrence of vascular events (stroke, myocardial infarction, vascular death) and mortality. LVH was present in 11%, impaired renal function in 15%, and albuminuria in 18%. Presence of at least two hypertensive target organ damage was prevalent in 8%. The risk for vascular events was hazard ratio 1.5 [95% confidence interval (CI) 1.2-1.9] for presence of one hypertensive target organ damage and hazard ratio 3.8 (95% CI 2.3-6.3) for three manifestations of hypertensive target organ damage (adjusted for age, sex). For mortality this was hazard ratio 1.4 (95% CI 1.1-1.7) and hazard ratio 3.2 (95% CI 1.9-5.2). Hazard ratios for single presence of different types of organ damage were comparable and independent of the presence of hypertension. CONCLUSIONS:: Impaired renal function, albuminuria, and LVH are prevalent in patients with vascular disease and confer independent and additive risk for vascular events and mortality. Measurement of hypertensive target organ damage in patients with vascular disease identifies patients at very high risk and may have treatment implications.
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ABSTRACT: There is no agreement on the systematic exploration of the fundus oculi (FO) in hypertensive patients, and it is unknown whether the evolution of retinal microcirculatory alterations has prognostic value or not. The aim of this study was to investigate whether the evolution of the arteriole-to-venule ratio (AVR) in newly-diagnosed hypertensive patients is associated with better or worse evolution of target organ damage (TOD) during 1 year. A cohort of 133 patients with newly-diagnosed untreated hypertension was followed for 1 year. At baseline and follow-up, all patients underwent a physical examination, self-blood pressure measurement, ambulatory blood pressure monitoring, blood and urine analysis, electrocardiogram, and retinography. The endpoint was the favourable evolution of TOD and the total amount of TOD, according to the baseline AVR and the baseline and final difference of the AVR. A total of 133 patients were analyzed (mean age, 57 ± 10.7 years; 59% men). No differences were found in the decrease in blood pressure or antihypertensive treatment between quartiles of baseline AVR or baseline-final AVR difference. Patients with a difference between baseline and final AVR in the highest quartile (>0.0817) had a favorable evolution of left ventricular hypertrophy (odds ratio, 14.9; 95% confidence interval, 1.08-206.8) and the amount of TOD (odds ratio, 2.22; 95% confidence interval, 1.03-6.05). No favorable evolution was found of glomerular filtration rate. There is an association between the evolution of the AVR and the favorable evolution of TOD. Patients with greater increase of AVR have significantly better evolution of left ventricular hypertrophy and amount of TOD.Journal of the American Society of Hypertension (JASH) 10/2013; DOI:10.1016/j.jash.2013.10.002 · 2.68 Impact Factor
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ABSTRACT: Whether the combination of chronic kidney disease (CKD) and left ventricular hypertrophy (LVH) affects the cardiovascular (CV) risk in patients with uncomplicated hypertension is poorly investigated. The aim of this study was to assess the effects of LVH, CKD, and their combination on CV events in hypertension.American Journal of Hypertension 06/2014; DOI:10.1093/ajh/hpu098 · 3.40 Impact Factor
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ABSTRACT: BACKGROUND Hypertension is the most prevalent and significant modifiable risk factor for coronary heart disease. A portion of patients with uncontrolled hypertension are considered to have resistant hypertension (RHTN). Myocardial ischemia incidence increases along with blood pressure (BP) levels. However, the prevalence of myocardial ischemia in patients with RHTN, as well as the factors associated with it, is unknown. METHODS We enrolled 129 patients with true RHTN regularly followed in our specialty hypertension clinic and evaluated then by resting and dipyridamole pharmacological stress myocardial perfusion scintigraphy. Patients were then divided into 2 groups: those with (I-RHTN; n = 36) and those without (NI-RHTN; n = 93) myocardial ischemia. Echocardiography, 24-hour ambulatory BP monitoring (ABPM), and flow mediated dilation (FMD) were also evaluated. RESULTS Thirty six (28%) patients had myocardial ischemia. There was no difference between groups regarding age, sex, biochemical parameters, office, and 24-hour ABPM levels. Patients in the I-RHTN group were more likely diabetic (31% vs. 11%; P < 0.05) and obese (75% vs. 40%; P < 0.001). Adjusting for age and body mass index, multiple logistic regression showed that diabetes (odds ratio (OR) = 6.5; 95% confidence interval (CI) = 1.06-40.14; P = 0.04), FMD (OR = 0.18; 95% CI = 0.07-0.41; P < 0.001), heart rate (OR = 1.23; 95% CI = 1.11-1.36; P < 0.001), left ventricular mass index (OR = 1.02; 95% CI = 1.01-1.04; P = 0.04), and microalbuminuria (OR = 1.02; 95% CI = 1.01-1.04; P = 0.002) were independent predictors of ischemia. CONCLUSIONS In conclusion, there is a high prevalence of myocardial ischemia in patients with RHTN. Increased microalbuminuria, heart rate, endothelial dysfunction, and left ventricular mass can be useful to guide the investigation for myocardial ischemia in these high risk patients.American Journal of Hypertension 07/2014; 28(2). DOI:10.1093/ajh/hpu140 · 3.40 Impact Factor