Normalization of ascending aorta dimension for body size influences pathophysiologic correlation in hypertensive

Costantino Mancusi1, Maria Virginia Manzi1, Maria Lembo1

  • 1Hypertension Research Center, Department of Advanced Biomedical Science, Federico II University, Via S. Pansini 5, Naples 80131, Italy.

Insights

Ascending aorta (AscAo) measurements in hypertensive patients vary by method. AscAo and AscAo normalized for height (AscAo/HT) show physiological consistency and predict cardiovascular risk, unlike AscAo normalized for body surface area (AscAo/BSA).

Area of Science:

  • Cardiology
  • Medical Imaging
  • Hypertension Research

Background:

  • Systemic hypertension can lead to aortic remodeling.
  • Accurate measurement of the ascending aorta (AscAo) is crucial for assessing cardiovascular risk.
  • Different normalization methods (e.g., height, body surface area) may influence AscAo measurements.

Purpose of the Study:

  • To assess the correlates and consistency of ascending aorta (AscAo) measurements in treated hypertensive patients.
  • To compare the physiological consistency of AscAo, AscAo normalized for height (AscAo/HT), and AscAo normalized for body surface area (AscAo/BSA).
  • To evaluate the association of these aortic measures with cardiovascular outcomes.

Main Methods:

  • Included 1634 adult patients with treated hypertension and available AscAo ultrasound.
  • Measured AscAo at end-diastole using the leading edge to leading edge method.
  • Explored correlations with demographics and metabolic profile; used multivariable regression and sensitivity analysis with cardiovascular outcomes.

Main Results:

  • AscAo, AscAo/HT, and AscAo/BSA showed similar correlations with age, eGFR, BP, and HR.
  • Obesity and diabetes were associated with greater AscAo and AscAo/HT but smaller AscAo/BSA.
  • Dilated AscAo and AscAo/HT, but not AscAo/BSA, were significantly associated with increased cardiovascular event risk.

Conclusions:

  • Aortic remodeling magnitude in hypertensive patients depends on the measurement method used.
  • AscAo and AscAo/HT measurements demonstrate physiological consistency.
  • AscAo/BSA is less physiologically consistent and does not reliably predict cardiovascular risk in this cohort.
Abstract

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