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.

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