Morning hypertension assessed by home monitoring is a strong predictor of concentric left ventricular hypertrophy in patients with untreated hypertension.

This study was performed to test whether morning hypertension defined by the morning-evening difference in home blood pressure (BP) (MEdif) and the average of morning and evening BP (MEave) is a determinant of concentric left ventricular hypertrophy (LVH). The authors enrolled patients with untreated hypertension and performed echocardiography and home BP monitoring for 14 consecutive days. All patients were classified into 4 groups by the MEave and MEdif and morning hypertension was defined by MEave ≥135 mm Hg and MEdif ≥15 mm Hg. Left ventricular (LV) geometry was classified as normal, concentric remodeling, eccentric LVH, or concentric LVH. The morning hypertensive patients had a higher LV mass index and relative wall thickness than the other groups. According to multivariable logistic regression analysis, morning hypertensive patients had a significantly increased risk of the concentric LVH (odds ratio, 6.5; 95% confidence interval, 2.5-17.2; P<.001) compared with home normotensive patients with MEdif <15 mm Hg, after adjusting for confounders. Moreover, even among the home normotensives (white-coat hypertensives), patients with MEdif ≥15 mm Hg had a higher percentage of concentric remodeling than those with MEdif <15 mm Hg (32.5% vs 14.7%, P=.017). Morning hypertension defined by the MEdif and MEave is a strong determinant of concentric LVH, suggesting that this definition could be used to determine the cardiovascular risk of morning hypertension.