Associations of alterations in pulsatile arterial load with left ventricular longitudinal strain

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

BACKGROUND Increased arterial stiffness leads to increased pulsatile load on the heart. We investigated associations of components of pulsatile load with a measure of left ventricular (LV) systolic function - global longitudinal strain (GLS), in a community-based cohort ascertained based on family history of hypertension. METHODS Arterial tonometry and echocardiography with speckle tracking were performed in 520 adults with normal LV ejection fraction (EF) (age 67±9 years, 70% hypertensive) to quantify measures of pulsatile load (characteristic aortic impedance (Zc), total arterial compliance (TAC), and augmentation index (AI)) and GLS. The associations of log-Zc, log-TAC, and AI with GLS were assessed using sex-specific z-scores for each measure of arterial load. RESULTS In univariable analyses, higher Zc was associated with worse GLS (less negative) and higher TAC and AI were associated with better GLS (all P < 0.001). In a multivariable model including age, sex, heart rate (HR), LVEF, mean arterial load (systemic vascular resistance), and measures of pulsatile load, Zc remained associated with GLS (β = 0.28, P < 0.001), while the associations of TAC and AI were no longer significant (P > 0.5). Additional adjustment for cardiovascular risk factors and history of coronary heart disease and stroke did not attenuate the association of Zc with GLS; Zc, sex, HR, LVEF remained associated with GLS after stepwise elimination (all P < 0.001). CONCLUSIONS Greater proximal aortic stiffness, as manifested by a higher Zc, is independently associated with worse LV longitudinal function.

Original languageEnglish (US)
Pages (from-to)1325-1331
Number of pages7
JournalAmerican journal of hypertension
Volume28
Issue number11
DOIs
StatePublished - Aug 5 2015

Keywords

  • aortic characteristic impedance
  • arterial load
  • arterial ventricular interaction
  • blood pressure
  • hypertension
  • left ventricular deformation
  • left ventricular function
  • speckle tracking echocardiography

ASJC Scopus subject areas

  • Internal Medicine

Fingerprint Dive into the research topics of 'Associations of alterations in pulsatile arterial load with left ventricular longitudinal strain'. Together they form a unique fingerprint.

Cite this