No Abstract available
Masked Hypertension* ; Masks*

Recent global hypertension guidelines recommend an early, strict and 24-hour blood pressure (BP) control for the prevention of target organ damage and cardiovascular events. Out-of-office BP measurement such as ambulatory BP monitoring and home BP monitoring is now widely utilized to rule out white-coat hypertension, to detect masked hypertension, to evaluate the effects of antihypertensive medication, to analyze diurnal BP variation, and to increase drug adherence. Nocturnal hypertension has been neglected in the management of hypertension despite of its clinical significance. Nighttime BP and non-dipping patterns of BP are stronger risk predictors for the future cardiovascular mortality and morbidity than clinic or daytime BP. In addition to ambulatory or home daytime BP and 24-hour mean BP, nocturnal BP should be a new therapeutic target for the optimal treatment of hypertension to improve prognosis in hypertensive patients. This review will provide an overview of epidemiology, characteristics, and pathophysiology of nocturnal hypertension and clinical significance, therapeutic implication and future perspectives of nocturnal hypertension will be discussed.
Blood Pressure ; Chronotherapy ; Epidemiology ; Humans ; Hypertension ; Masked Hypertension ; Mortality ; Prognosis

BACKGROUND: Clinic-based blood pressure measurements may lead to untoward results in the management of hypertension. Masked hypertension (MH) has been shown to be related to a poor prognosis due to its hidden nature. The purpose of this study is to present the clinical predictors of MH in elderly patients over 65 years with well-controlled clinic blood pressure (CBP) and to evaluate the gap, the 'mask effect' (negative white-coat effect), between CBP and home blood pressure (HBP). METHODS: The BPs of 1,019 treated hypertensive patients were measured by a doctor at an out-patient clinic and by patients themselves at home. Clinical parameters for MH were analyzed in 511 patients with well-controlled CBP (45.6% men, mean age 57.1+/-9.0 years). RESULTS: Among the patients over 65 years (n=113, 46.8% men, mean age 68.4+/-7.3 years) and with well-controlled CBP, the prevalence of MH was 26.5% (30 patients). In multivariate-adjusted analysis, the risk of MH increased with physical inactivity (odds ratio [OR], 2.942; 95% confidence interval [CI], 1.039-8.329; p=0.042), use of beta-blocker (OR, 4.242; 95% CI, 1.528-11.785; p=0.06) and systolic clinic BP (OR, 1.083; 95% CI, 0.017-1.154; p=0.013). Furthermore, HBP correlated well with CBP (r=0.329; p<0.001) and further with degree of ME (r=0.723; p<0.001). CONCLUSION: In looking for MH, it would be useful to carefully assess patients taking beta-blockers, having higher CBP, and who are physically inactive by using self-monitoring home or ambulatory BP monitoring.
Aged ; Blood Pressure ; Humans ; Hypertension ; Male ; Masked Hypertension ; Masks ; Outpatients ; Prevalence ; Prognosis

BACKGROUND: Many studies have aimed to determine whether body mass index (BMI), waist circumference (WC), or waist to hip ratio (WHR) best predicts hypertension in diabetic patients, with conflicting results. However, no study has examined the specific relationship between these anthropometric parameters with sustained normotension (SNT), white coat hypertension (WCHT), masked hypertension (MHT), and sustained hypertension (SHT) based on office and ambulatory blood pressure (BP) measurements in these patients. METHODS: Patients with newly diagnosed type 2 diabetes underwent the following procedures: history taking, measurements of anthropometric parameters, office and ambulatory BP measurements, physical examination, laboratory analysis, and random and 24-hour urine analysis. RESULTS: In total, there were 65 dippers and 37 nondipper patients. None of the anthropometric parameters were different between the dippers and the nondippers. There were 25 patients with SNT, 32 with WCHT, seven with MHT, and 38 with SHT. A comparison of anthropometric parameters between these four groups of patients showed that WC (P=0.016) and WHR (P=0.015) were different among all groups. According to regression analysis, only BMI was independently related with MHT (odds ratio [OR], 1.373, P=0.022), whereas only WC has been associated with SHT (OR, 1.321, P=0.041). CONCLUSION: Among anthropometric parameters, only WC and WHR were different in SNT, WCHT, MHT, and SHT in newly diagnosed patients with type 2 diabetes.
Blood Pressure ; Body Mass Index ; Humans ; Hypertension ; Masked Hypertension ; Masks ; Physical Examination ; Waist Circumference ; Waist-Hip Ratio ; White Coat Hypertension

BACKGROUND AND OBJECTIVES: Blood pressure variability (BPV) was recently shown to be a risk factor of stroke. White coat hypertension (WCH) used to be regarded as innocuous, but one long-term follow-up study reported that WCH increased stroke rate compared to normotension (NT). In this study, we aimed to evaluate the relationship between WCH and BPV. SUBJECTS AND METHODS: We analyzed 1398 subjects from the Korean Ambulatory Blood Pressure Registry, who were divided into NT (n=364), masked hypertension (n=122), white coat hypertension (n=254), and sustained hypertension (n=658) groups. RESULTS: Baseline characteristics were similar among groups. The average real variability (ARV), a highly sensitive BPV parameter, was highest in the WCH group, followed by the sustained hypertension, masked hypertension, and NT groups. The results persisted after being adjusted for covariates. The WCH vs. sustained hypertension results (adjusted mean±standard error) were as follows: 24-h systolic ARV, 22.9±0.8 vs. 19.4±0.6; 24-h diastolic ARV, 16.8±0.6 vs. 14.3±0.5; daytime systolic ARV, 21.8±0.8 vs. 16.8±0.6; and daytime diastolic ARV, 16.2±0.6 vs. 13.4±0.5 (p<0.001 for all comparisons). CONCLUSION: From the registry data, we found that subjects with WCH or masked hypertension had higher BPV than NT. However, long-term follow-up data assessing the clinical influences of WCH on stroke are needed.
Blood Pressure Monitoring, Ambulatory* ; Blood Pressure* ; Follow-Up Studies ; Hypertension ; Masked Hypertension ; Risk Factors ; Stroke ; White Coat Hypertension*

This review represents the clinical significance of home blood pressure (BP) and its possible practical application. Home BP is highly reproducible and its reproducibility is better than ambulatory BP. According to this feature home BP has a greater prognostic value at least than clinic BP and is extremely effective for the evaluation of drug effects and their duration. The introduction of home BP to the diagnosis and treatment of hypertension facilitates long-term BP control. Home BP is particularly important for the diagnosis and treatment of hypertension in diabetes mellitus, pregnancy, children and renal diseases. Home BP measurements improve the adherence to medications and medical consultations, and are indispensable for diagnosis of white coat hypertension and masked hypertension. Such efficiency of home BP improves medical economy. Home BP can detect minimal charge in BP mediated by medication, and intrinsic and extrinsic stimuli and detect long-term change in BP. Thus, home BP is now indispensable for improvement in the management of hypertension in medical practice as well as for the recognition of hypertension in the general population. Standardization of the measurement procedure may elevate the position of home BP in the practice of diagnosing and treating hypertension.
Blood Pressure ; Child ; Diabetes Mellitus ; Fees and Charges ; Humans ; Hypertension ; Masked Hypertension ; Pharmacology, Clinical ; Pregnancy ; Referral and Consultation ; White Coat Hypertension

Blood pressure (BP) control is considered the most important treatment for preventing chronic kidney disease (CKD) progression and associated cardiovascular complications. However, clinic BP is insufficient to diagnose hypertension (HT) and to monitor overall BP control because it does not correlate well with ambulatory blood pressure monitoring (ABPM). We enrolled 387 hypertensive CKD patients (stages G1–G4, 58.4% male with median age 61 years) from 3 hospitals in Korea. HT of clinic BP and ABPM was classified as ≥ 140/90 and ≥ 130/80 mmHg, respectively. Clinic BP control rate was 60.2%. The median 24-hour systolic blood pressures (SBPs) of CKD G3b and CKD G4 were significantly higher than those of CKD G1–2 and CKD G3a. However, the median 24-hour SBPs were not different between CKD G1–2 and CKD G3a or between CKD G3b and CKD G4. Of all patients, 5.7%, 38.0%. 42.3%, and 14.0% were extreme-dippers, dippers, non-dippers, and reverse-dippers, respectively. Non-/reverse-dippers independently correlated with higher Ca × P product, higher intact parathyroid hormone (iPTH), and lower albumin. Normal BP was 33.3%, and sustained, masked, and white-coat HT were 29.7%, 26.9%, and 10.1%, respectively. White-coat HT independently correlated with age ≥ 61 years and masked HT independently correlated with CKD G3b/G4. In conclusion, ABPM revealed a high prevalence of non-/reverse-dippers and sustained/masked HT in Korean CKD patients. Clinicians should try to obtain a CKD patient's ABPM, especially among those who are older or who have advanced CKD as well as those with abnormal Ca × P product, iPTH, and albumin.
Blood Pressure Monitoring, Ambulatory ; Blood Pressure* ; Humans ; Hypertension ; Korea ; Male ; Masked Hypertension ; Masks ; Parathyroid Hormone ; Prevalence ; Renal Insufficiency, Chronic*

BACKGROUND: The use of ambulatory blood pressure monitoring (ABPM) in childhood hypertension has been in great advance. ABPM has been able to detect significantly high blood pressure (BP) and also helpful for identifying white coat hypertension. METHODS: Between March 2007 and December 2009, we evaluated individuals aged from 7 to 19 years who were referred as high BP with ABPM, echocardiogram, and abdominal computerized tomography, calculation of body mass index (BMI) at Ajou University Hospital. ABPM was performed using the Tonoport V monitors and SpaceLab 90217 monitors. Seventy were evaluated with 55 boys and 5 girls. The mean age of them was 13.1 +/- 2.8 years (mean +/- standard deviation). RESULTS: Forty of seventy (57.1%) were diagnosed as hypertension in ABPM and 8 of 40 were diagnosed as secondary hypertension with underline diseases such as hyperthyroidism, chronic renal disease, Takayasu's arteritis, coarctation of aorta. The mean BMI in 40 was 24.8 +/- 4.72 kg/m2. Twenty-three of seventy (32.8%) were obese with higher prevalence than in general population. White coat hypertension was diagnosed in 30 of 70 (42.9%). CONCLUSIONS: ABPM could provide more detailed data including mean values of BP, load, and night dip in assessment of children's BP. According to increasing children's obesity, use of ABPM was thought to be necessary for evaluation of their risk of hypertension and useful for diagnosis of masked hypertension and white coat hypertension. Further more study of ABPM in children and adolescents would be needed for absolute standards of ABPM.
Adolescent ; Aged ; Aortic Coarctation ; Blood Pressure Monitoring, Ambulatory ; Body Mass Index ; Child ; Humans ; Hypertension ; Hyperthyroidism ; Masked Hypertension ; Obesity ; Prevalence ; Renal Insufficiency, Chronic ; Takayasu Arteritis ; White Coat Hypertension

OBJECTIVES: Blood pressure variation (BPV) and metabolic syndrome is an independent risk factor for cardiovascular events. Ambulatory blood Pressure (ABP) has been shown to be more closely related to cardiovascular events in hypertensive patients than conventional office BP (OBP). Using both OBP and ABP, 4 groups of patients were identified: (1) normotensive patients (NT); (2) white coat hypertensives (WCHT); (3) masked hypertensives (MHT); and (4) sustainedhypertensives (SHT). We investigated the significance of BPV and metabolic risks of these 4 groups. METHODS: This study is a retrospective analysis of patients between January 2008 and May 2013. Echocardiography and 24 hour ABP monitoring were performed. RESULTS: BMI was significantly higher in the MHT compared with the NT. There were progressive increases in fasting glucose level from NT to WCHT, MHT, and SHT.MHT and SHT had higher 24h and nighttime BPV than NT.MHT was significantly related with BMI (r = 0.139, P = 0.010), creatinine (r = 0.144, P = 0.018), fasting glucose (r = 0.128, P = 0.046), daytime systolic BPV (r = 0.130, P = 0.017), and daytime diastolic BPV (r = 0.130, P = 0.017). Dyslipidemia (r = 0.110, P = 0.043), nighttime systolic BPV (r = 0.241, P < 0.001) and nighttime diastolic BPV (r = 0.143, P = 0.009) shown correlation with SHT. In multivariate logistic regression, MHT was independently associated with Body mass index (OR 1.086, 95% CI 1.005–1.174, P = 0.038) and creatinine (OR 1.005, 95% CI 1.001–1.010, P = 0.045). CONCLUSIONS: BPV and metabolic risk factors were found to be greater in MHT and SHT compared with NT and WCHT. This suggests that BPV and metabolic risks may contribute to the elevated cardiovascular risk observed in patients with MHT and SHT.
Blood Pressure* ; Body Mass Index ; Creatinine ; Dyslipidemias ; Echocardiography ; Fasting ; Glucose ; Humans ; Hypertension* ; Logistic Models ; Masked Hypertension ; Masks ; Retrospective Studies ; Risk Factors* ; White Coat Hypertension

BACKGROUND: Masked hypertension is well known for its poor cardiovascular outcome. But clinical clues related to the masked hypertension and/or masked effect (ME) are rarely known. Physical activity and/or job stress are related to increased daytime blood pressure (BP). This study is to identify whether ME is caused by physical activity and/or job category. METHODS: Physical activity using Actical and masked effect by clinic BP and ambulatory BP monitoring were applied to 167 person for this study. RESULTS: Age of the subjects was 54.9 +/- 9.6 and 74 subjects were female (57.4%). Field worker was 81 (48.5%) and office worker was 86 (51.5%). Clinic BP was 125.8 +/- 14.3 mmHg / 79.8 +/- 10.9 mmHg in male and 119.0 +/- 14.0 mmHg / 74.2 +/- 8.9 mmHg in female (p = 0.03). Daily energy expenditure representing physical activity was 1,831.1 +/- 420.4 kcal. ME for systolic BP was 11.0 +/- 11.1 mmHg and ME for diastolic BP was 3.9 +/- 8.0 mmHg. In multiple linear regression adjusted by smoking and antihypertensive medication showed that clinic systolic BP was the only significant factor related to the ME (beta = -0.44755, p < 0.0001 in male, beta = -0.396, p < 0.0001 in female). Physical activity or job category was not related to ME. CONCLUSIONS: Neither physical activity nor job category is related to ME. This indicates that diagnosis of the masked hypertension is not affected by physical activity or job status.
Blood Pressure ; Blood Pressure Monitoring, Ambulatory ; Energy Metabolism ; Female ; Health Personnel ; Humans ; Hypertension ; Linear Models ; Male ; Masked Hypertension ; Masks ; Motor Activity ; Smoke ; Smoking