3Masked hypertension (MH) is a clinical condition that indicates normal values of clinic blood pressure (BP) but elevated 24-hour BP. The purpose of this study was to investigate the relationship between MH and left atrial (LA) phasic function evaluated by both the volumetric and speckle tracking method. This cross-sectional study included 49 normotensive individuals, 50 patients with MH, and 70 untreated sustained hypertensive patients adjusted by age and sex. MH was diagnosed if clinic BP was normal and 24-hour BP was increased. LA reservoir function was lower in patients with MH and those with sustained hypertension compared with the normotensive group. LA conduit function gradually decreased, while LA booster pump function progressively increased, from normotension to sustained hypertension. Similar results were obtained by two-dimensional echocardiographic strain analysis. Independently of main clinic and echocardiographic characteristics, 24-hour systolic BP was associated with LA passive ejection fraction, LA total longitudinal strain, LA positive longitudinal strain, and LA stiffness index. In conclusion, MH is associated with impairment of LA phasic function and stiffness, and 24-hour systolic BP increment was closely related with LA remodeling. J Clin Hypertens (Greenwich). 2017;19:305-311. ª2016 Wiley Periodicals, Inc.At the beginning of the new millennium, the increasing use of ambulatory blood pressure (BP) monitoring (ABPM) has revealed the whole range of different BP patterns such as white-coat hypertension, sustained hypertension, nocturnal hypertension, and normotension. This was the reason for the introduction of 24-hour ABPM in guidelines regarding diagnosis of arterial hypertension and in everyday clinical practice. ABPM could provide true and prognostic information on BP variability in hypertensive patients.1 Recent analysis shows important prognostic value of BP variability, assessed by 24-hour ABPM, in white-coat hypertension among older patients.
2Thomas Pickering was the first to use the term masked hypertension (MH).3 Shortly thereafter investigations appeared that demonstrated a negative influence of MH on target organ damage, including cardiac hypertrophy, carotid atherosclerosis, and albuminuria. [4][5][6] These changes could explain the unfavorable prognosis of patients with MH and increased cardiovascular morbidity and mortality in this population. 7,8 Our recent meta-analysis included 776 patients with MH and showed that MH is associated with significant risk of left ventricular (LV) structural changes, primarily LV hypertrophy.
9Left atrial (LA) remodeling has not been sufficiently investigated in MH so far. Sincer and colleagues 10 provided data only on LA diameter, without any further details regarding LA volume (LAV) and phasic function, and they did not find a significant difference between normotensive control, sustained hypertensive, and MH patients. 10 In addition, LA remodeling could significantly contribute to increased morbidity and mortality in MH. In this context, rec...