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From treatment to organ damage; A 5‐year follow‐up study of ambulatory blood pressure in essential hypertension. Diversity between development of left ventricular hypertrophy and urinary albumin excretion

This study aimed to assess blood pressure (BP) profile, BP control, left ventricular hypertrophy (LVH) and albumin/creatinine ratio (ACR) in urine after 5 years of antihypertensive treatment in subjects with newly diagnosed essential hypertension. Fifty‐four subjects were included and prescribed calcium‐channel blocker in monotherapy during an 8‐week period, and later 46 subjects (34 men, 12 women, 53.1±8.6 years) attended a 5‐year follow‐up visit at the hypertension clinic. They underwent 24‐h ambulatory BP monitoring (ABPM), ECG and ACR at baseline and after 5 years. Echocardiography performed after 5 years revealed LVH in 54% of the subjects, while there was no change in Cornell product, an ECG criterion for LVH. BP control assessed by office BP was 33%, and only 20% using 24‐h ABP. Night‐time fall in BP was significantly attenuated from 13.2±5.9% to 10.7±6.0%, p = 0.01 for systolic BP and from 13.3±6.9% to 9.8±6.8%, p = 0.004 for diastolic BP. The number of dippers decreased after 5 years, but this did not reach statistical significance. In contrast to the lack of change in Cornell product, there was a significant decrease in ACR, and 93% of the subjects had ACR<1.5 mg/mmol after 5 years compared with 57% at baseline (p<0.001). Thus, ABPM should be encouraged in the follow‐up of all hypertensive subjects as it reveals better inadequate BP control than office BP and gives information about night‐time fall, as this may explain the high prevalence of LVH. The diversity in development of LVH and ACR during antihypertensive treatment needs to be verified.