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Left ventricular hypertrophy in isolated and dual masked hypertension
Cesare Cuspidi1,2, Rita Facchetti1, Fosca Quarti-Trevano1
1Department of Medicine and Surgery, University of Milano-Bicocca, Milano, Italy.
Insights
Masked hypertension (MH), where office blood pressure is normal but home or ambulatory readings are high, is linked to left ventricular hypertrophy (LVH). Isolated MH poses a similar LVH risk as dual MH.
Area of Science:
- Cardiology
- Hypertension Research
- Diagnostic Imaging
Background:
- Masked hypertension (MH) is characterized by normal office blood pressure (BP) with elevated readings during ambulatory BP monitoring (ABP) or home BP monitoring (HBPM).
- Left ventricular hypertrophy (LVH) is a significant cardiovascular risk factor, often associated with hypertension.
- The clinical implications of different masked hypertension phenotypes, particularly isolated forms, on cardiac structure require further elucidation.
Purpose of the Study:
- To investigate the association between various masked hypertension phenotypes (isolated home MH, isolated ambulatory MH, dual MH) and echocardiographic left ventricular hypertrophy (LVH).
- To compare the risk of LVH in individuals with different types of masked hypertension versus true normotensives.
Main Methods:
- Analysis of 1087 participants from the PAMELA study with normal office BP and measurable left ventricular mass (LVM).
- Classification of participants into true normotensives and different masked hypertension subgroups based on office, home, and ambulatory BP measurements.
- Echocardiographic assessment of left ventricular mass indexed to body surface area (LVM/BSA) and prevalence of LVH.
Main Results:
- 17.7% of participants exhibited some form of masked hypertension.
- Average LVM/BSA was significantly higher in all masked hypertension phenotypes compared to true normotensives.
- The prevalence of LVH was similar across isolated home MH, isolated ambulatory MH, and dual MH groups, ranging from 8.3% to 10.8%.
Conclusions:
- Isolated masked hypertension, whether from elevated home or ambulatory BP, is associated with an increased risk of left ventricular hypertrophy.
- The risk of LVH in isolated masked hypertension is comparable to that observed in dual masked hypertension.
- Both home and ambulatory BP measurements are crucial for accurately assessing cardiovascular risk, specifically LVH, in individuals with masked hypertension.
Abstract:
Masked hypertension (MH) is defined as normal office blood pressure (BP) and elevated ambulatory BP (ABP) or home BP or both. This study assessed the association of MH (ie, isolated home, isolated ABP and dual MH) with echocardiographic left ventricular hypertrophy (LVH). The present analysis of the PAMELA study included 1087 untreated and treated participants with normal office BP and a measurable LV mass (LVM). A total of 193 individuals (17.7%) had any MH (ie, normal office BP, elevated ABP or home BP or both), 48 had dual MH (25%), 62 isolated ambulatory MH (32%), and 83 isolated home MH (43%). Average LVM indexed to body surface area was superimposable in the three MH phenotypes (being the largest difference between groups <3 g/m2 ) and significantly higher than in true normotensives. This was also for the LVH prevalence that varied across the MH subgroups in a narrow range (from 8.3% to 10.8%). In conclusion, individuals from the general population with isolated MH, in which either home or ABP was elevated, exhibited an increased risk of LVH similar to that entailed by dual MH. Our findings add the notion both home and ABP measurements are useful to more accurately assess the risk of LVH associated with MH in the community.
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