Reflection magnitude as a predictor of mortality the multi-ethnic study of atherosclerosis

Payman Zamani, David R. Jacobs, Patrick Segers, Daniel A. Duprez, Lyndia Brumback, Richard A. Kronmal, Scott M. Lilly, Raymond R. Townsend, Matthew Budoff, Joao A. Lima, Peter Hannan, Julio A. Chirinos

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Arterial wave reflections have been associated with mortality in an ethnically homogenous Asian population. It is unknown whether this association is present in a multiethnic population or whether it is independent of subclinical atherosclerosis. We hypothesized that reflection magnitude (defined as the ratio of the amplitude of the backward wave [Pb] to that of the forward wave [Pf]) is associated with all-cause mortality in a large multiethnic adult community-based sample. We studied 5984 participants enrolled in the Multi-Ethnic Study of Atherosclerosis who had analyzable arterial tonometry waveforms. During 9.8±1.7 years of follow-up, 617 deaths occurred, of which 134 (22%) were adjudicated cardiovascular deaths. In Cox proportional hazards models, each 10% increase in reflection magnitude was associated with a 31% increased risk for all-cause mortality (hazard ratio [HR]=1.31; 95% confidence interval [CI]=1.11-1.55; P=0.001). This relationship persisted after adjustment for various confounders and for markers of subclinical atherosclerosis (HR=1.23; 95% CI=1.01-1.51; P=0.04), including the coronary calcium score, ankle-brachial index, common carotid intima-media thickness, and ascending thoracic aortic Agatston score. Pb was independently associated with all-cause mortality in a similarly adjusted model (HR per 10 mm Hg increase in Pb=2.18; 95% CI=1.21-3.92; P=0.009). Reflection magnitude (HR=1.71; 95% CI=1.06-2.77; P=0.03) and Pb (HR=5.02; 95% CI=1.29-19.42; P=0.02) were mainly associated with cardiovascular mortality. In conclusion, reflection magnitude is independently associated with all-cause mortality in a multiethnic population initially free of clinically evident cardiovascular disease. This relationship persists after adjustment for a comprehensive set of markers of subclinical atherosclerosis.

Original languageEnglish (US)
Pages (from-to)958-964
Number of pages7
JournalHypertension
Volume64
Issue number5
DOIs
StatePublished - Nov 1 2014

Keywords

  • Arteries
  • Atherosclerosis
  • Mortality

Fingerprint Dive into the research topics of 'Reflection magnitude as a predictor of mortality the multi-ethnic study of atherosclerosis'. Together they form a unique fingerprint.

Cite this