Early morning-Best time window of hourly 24-hour ambulatory blood pressure in relation to hypertensive organ damage: The Japan Morning Surge-Home Blood Pressure study

Association between Morning Surge and Left Ventricular Hypertrophy in Obese Hypertensive Patients

BACKGROUND

Weight gain can trigger mechanisms that increase blood pressure. Nevertheless, obesity causes structural changes in the myocardium, including increased ventricular mass, atrial dilatation, and diastolic and systolic dysfunction. Additionally, blood pressure variations, like morning surge (MS) in obese hypertensive patients may have clinical relevance in cardiovascular events. Although morning blood pressure surge is a physiological phenomenon, excess MS can be considered an independent risk factor for cardiovascular events.

OBJECTIVE

To evaluate MS values and their association with left ventricular hypertrophy (LVH) and nocturnal dipping (ND) in obese and non-obese hypertensive patients.

METHODS

A cross-sectional study that evaluated BP measurements by ambulatory blood pressure monitoring (ABPM) and the presence of LVH by echocardiography in 203 hypertensive outpatients, divided into two groups: 109 non-obese and 94 obese hypertensives patients. The significance level was set at 0.05 in two-tailed tests.

RESULTS

A MS above 20 mmHg by ABPM was detected in 59.2% of patients in the non-obese group and 40.6% in the obese group. LVH was found in 18.1% and 39.3% of patients in the non-obese and obese groups, respectively, p<0.001. In the "obese group", it was observed that a MS>16 mmHg was associated with LVH, [prevalence ratio: 2.80; 95%CI (1.12-6.98), p=0.03]. For the non-obese group, the cut-off point of MS for this association was >22 mmHg.

CONCLUSION

High MS was positively associated with LVH, with a particular behavior in the hypertensive obese group.

The HOPE Asia network 2022 up-date consensus statement on morning hypertension management

Morning hypertension is an important clinical target in the management of hypertension for perfect 24-h blood pressure (BP) control. Morning hypertension is generally categorized into two types: "morning surge" type and "sustained nocturnal and morning hypertension" type. The "morning surge" type is characterized by an exaggerated morning blood pressure surge (MBPS), and the "sustained nocturnal and morning hypertension" type with continuous hypertension from nighttime to morning (non-dipper/riser type). They can be detected by home and ambulatory blood pressure measurements (HBPM and ABPM). These two forms of morning hypertension both increase the risk of cardiovascular and renal diseases, but may occur via different pathogenic mechanisms and are associated with different conditions. Morning hypertension should be treated to achieve a morning BP level of < 135/85 mmHg, regardless of the office BP. The second target morning BP levels is < 125/75 mmHg for high-risk patients with morning hypertension and concomitant diseases. Morning hypertension is more frequently found in Asians, than in Westerners. Thus, the management of morning hypertension is especially important in Asia. The detection of morning hypertension and the individual home BP-guided treatment approach targeting morning BP in combination with ABPM, and the optimal treatment of morning hypertension would reduce cardiovascular events in Asia.

Relationship between morning blood pressure surge and the frontal plane QRS-T angle in newly diagnosed hypertensive patients

BACKGROUND

Morning blood pressure surge (MBPS) plays an important role in target organ damage and major adverse cardiac events. The frontal QRS-T [f(QRS-T)] angle is the electrocardiographic marker and index of ventricular arrhythmogenic events. We aimed to investigate the relationship between MBPS and the f(QRS-T) angle, which is an indicator of ventricular repolarization disorder, in patients with newly diagnosed HT.

METHODS

Between June 2020 and March 2021, 263 patients with newly diagnosed HT who were admitted to our outpatient clinic were prospectively included in the study. According to ambulatory blood pressure monitoring (ABPM), the patients were categorized into two groups: Group-I: low-value MBPS (<37 mm Hg), and group-II: high-value MBPS (≥37 mm Hg). The f(QRS-T) angle calculated from the 12-lead electrocardiogram and all other data were compared between the groups.

RESULTS

A total of 186 newly diagnosed HT patients who met the inclusion criteria were included in the study. The average f(QRS-T) angle in Groups I and 2 was 21° ± 16° and 51° ± 30°, respectively (P < .001). According to multivariate regression analysis, T peak-end and MBPS were found to be independent predictors of the f(QRS-T) angle.

CONCLUSIONS

As a result of our study, we found that the f(QRS-T) angle was widened in patients with exaggerated MBPS. The cause of increased cardiovascular outcomes in patients with exaggerated MBPS may be explained by widened in the f(QRS-T) angle that is a ventricular repolarization parameter.

Can Systemic Immune-Inflammation Index Detect the Presence of Exxaggerated Morning Blood Pressure Surge in Newly Diagnosed Treatment-Naive Hypertensive Patients?

Background: The exaggerated morning blood pressure surge (MS) is associated with target organ damage and cardiovascular events. Systemic immune-inflammation index (SII) has been detected as a useful marker in tumors and cardiovascular diseases. The role of inflammation in the pathogenesis of hypertension is a well-known issue. We aimed to investigate whether there is an association between SII and exaggerated MS in newly diagnosed treatment-naive hypertensive patients.Material and Methods: In total, 343 newly diagnosed in clinical and 24-h ambulatory blood pressure (BP) monitoring treatment-naive hypertensive patients were included in this study. Morning surge was defined as the difference between morning BP, which was the mean of BP during 2 h after wake-up, and the lowest BP, which was the mean of three lowest BP during nighttime. A cutoff value of 52.1 mmHg was used to discriminate the high- and low value MS groups. SII was calculated based on neutrophil, platelet, and lymphocyte counts.Results: Neutrophil, platelet, SII, neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR) were higher, whereas lymphocyte counts were lower in the high-value MS than the low-value MS. These indices were all independently associated with exaggerated MS and SII was superior to all other indices for detecting the presence of exaggerated MS. SII was moderately correlated with morning BP surge (r: 0.489, p < 0.0001).Conclusion: SII was higher in patients with exaggerated MS and was independently associated with exaggerated MS. Furthermore, SII might be a better indicator than platelet, neutrophil, lymphocyte, NLR, and PLR for the presence of exaggerated MS.

Morning blood pressure surge is associated with the severity of stable coronary artery disease in hypertensive patients

Background: We aimed to investigate the association between morning surge (MS) of blood pressure (BP) and SYNTAX score (SS) which gives information regarding the complexity and extent of coronary artery disease (CAD) in hypertensive patients. Methods: We included 187 hypertensive patients (134 males, 53 females; mean age: 62.5 ± 10.9 years) who underwent elective coronary angiography. Patients with the acute coronary syndrome and a history of coronary intervention were excluded from the study. The MBPS was calculated as the difference between the average BP during the 2 hours after awakening (four BP readings) and the lowest nighttime BP. The severity of coronary lesions was evaluated based on the SS assessed by coronary angiography. Patients were classified into two groups according to SS: low SS (SS ≤ 22) and intermediate-to-high SS (>22).Results: Patients in the intermediate-to-high SS group were found to be older, have higher uric acid levels, average daytime systolic BP (SBP), nighttime SBP, morning SBP, MS of BP and have higher rates of diabetes (DM) and female gender. There was no significant difference in terms of hypertensive treatment. In multivariate analysis, MS of BP (OR: 2.151, p: 0.005) and DM (OR: 0.014, p: 0.015) were independent parameters for predicting intermediate-to-high SS. The cutoff value of MS of BP obtained by ROC curve analysis was 18,5 mmHg for prediction of intermediate-high SS (sensitivity: 76.5%, specificity: 71.2%). The area under the curve was 0.762 (p < .001).Conclusion: MS of BP significantly correlates with the severity of coronary stenosis in hypertensive patients, suggesting that it could be a potential predictive marker of CAD.

Study on ferroptosis pathway that operates in hypertensive brain damage

OBJECTIVE

This study aimed to explore the mechanism of hypertensive brain damage from ferroptosis pathway.

METHODS

Ten 22-week-old SHR rats were labeled as hypertension group(HBP), while ten WKY rats of comparable age, weight were used as normal blood pressure group(NBP). After 2 weeks of feeding, hypertensive brain damage was observed by comparing the pathological changes of brain tissue in SHR rats and WKY rats. Furthermore, the expression of GPX4 in the cerebral cortex was detected by immunofluorescence. The content of GSH was determined by spectrophotometer. The content of iron was detected by ferrous chromite colorimetry. And the content of MDA was determined by spectrophotometer. Compare the difference to investigate the role of ferroptosis mechanism in hypertensive brain damage.

RESULTS

Brain damage occurred in 24-week-old SHR rats compared with WKY rats. In the HBP, the GPX4 and GSH were significantly lower than those in the NBP, and the total iron content and MDA were significantly increased.

CONCLUSION

Thses findings suggest ferroptosis is closely related to hypertensive brain damage. Elevated blood pressure leads to iron overload in the brain. Excessive iron increases oxidative stress and lipid peroxidation in the brain, and eventually causes brain damage.

Increasing incidence of macular edema in excessive morning blood pressure surge in patients with retinal vein occlusion

Morning blood pressure surge (MBPS) had been known to be associated with hypertensive target organ injury and vascular events. Retinal vein occlusion (RVO) is also known to be related with underlying cardiovascular risk factors. This study investigated the effect of MBPS on patients with RVO. In total, 76 patients with RVO who had undergone systemic cardiovascular examination including a 24-hour ambulatory blood pressure monitoring, carotid artery intima media thickness, and pulse wave velocity were evaluated between January 2015 and February 2019. The MBPS was calculated as follows: mean systolic blood pressure measured over two hours after awakening minus mean systolic blood pressure measured during the one hour that included the lowest sleep blood pressure. Macular edema was significantly more prevalent in the MBPS group compared with the non-MBPS group. After adjusting for confounding factors, multivariate regression analyses revealed that MBPS independently predicted macular edema in patients with RVO [Odds ratio 4.75, 95% confidence interval 1.136–16.6, p = 0.015]. In conclusion, evaluating blood pressure patterns, especially MBPS, using 24-hour ambulatory blood pressure monitoring may be useful for assessing and predicting ophthalmologic outcome and may facilitate better blood pressure control in patients with RVO.

Clinical applications for out-of-office blood pressure monitoring

Hypertension is one of the most common chronic diseases as well as the leading risk factor for cardiovascular disease (CVD). Efficient screening and accurate blood pressure (BP) monitoring are the basic methods of detection and management. However, with developments in electronic technology, BP measurement and monitoring are no longer limited to the physician's office. Epidemiological and clinical studies have documented strong evidence for the efficacy of out-of-office BP monitoring in multiple fields for managing hypertension and CVD. This review discusses applications for out-of-office BP monitoring, including home blood pressure monitoring (HBPM) and ambulatory blood pressure monitoring (ABPM), based on recent epidemiological data and clinical studies regarding the following factors: the detection of abnormal BP phenotypes, namely, white coat hypertension and masked hypertension; stronger ability to determine the prognosis for target organ damage and mortality; better BP control; screening for hypotension; and unique approaches to identifying circadian BP patterns and BP variability.