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Revista Española de Cardiología (English Edition) Revista Española de Cardiología (English Edition)
Rev Esp Cardiol. 2017;70:363-70 - Vol. 70 Num.05 DOI: 10.1016/j.rec.2016.10.004

Iron Deficiency Is a Determinant of Functional Capacity and Health-related Quality of Life 30 Days After an Acute Coronary Syndrome

Oona Meroño a,, Mercè Cladellas a, Núria Ribas-Barquet a, Paula Poveda b, Lluis Recasens a, Víctor Bazán b, Cosme García-García b, Consol Ivern a, Cristina Enjuanes a, Salvador Orient c, Joan Vila d, Josep Comín-Colet a

a Departamento de Cardiología, Hospital del Mar, Grupo de Investigación Biomédica en Enfermedades del Corazón, IMIM (Instituto Hospital del Mar de Investigaciones Médicas), Universitat Autònoma de Barcelona, Barcelona, Spain
b Departamento de Cardiología, Hospital del Mar, Barcelona, Spain
c Laboratorio de Referencia de Catalunya, El Prat de Llobregat, Barcelona, Spain
d Grupo de Investigación en Genética y Epidemiología Cardiovascular, Programa de Investigación en Procesos Inflamatorios y Cardiovasculares, IMIM (Instituto Hospital del Mar de Investigaciones Médicas)-Hospital del Mar, Barcelona, Spain

Keywords

Iron deficiency. Acute coronary syndrome. Inflammation. Functional capacity. Exercise capacity. Quality of life.

Abstract

Background and objectives

Iron deficiency (ID) is a prevalent condition in patients with ischemic heart disease and heart failure. Little is known about the impact of ID on exercise capacity and quality of life (QoL) in the recovery phase after an acute coronary syndrome (ACS).

Methods

Iron status and its impact on exercise capacity and QoL were prospectively evaluated in 244 patients 30 days after the ACS. QoL was assessed by the standard EuroQoL-5 dimensions, EuroQoL visual analogue scale, and Heart-QoL questionnaires. Exercise capacity was analyzed by treadmill/6-minute walk tests. The effect of ID on cardiovascular mortality and readmission rate was also investigated.

Results

A total of 46% of the patients had ID. These patients had lower exercise times (366 ± 162 vs 462 ± 155 seconds; P < .001), metabolic consumption rates (7.9 ± 2.9 vs 9.3 ± 2.6 METS; P = .003), and EuroQoL-5 dimensions (0.76 ± 0.25 vs 0.84 ± 0.16), visual analogue scale (66 ± 16 vs 72 ± 17), and Heart-QoL (1.9 ± 0.6 vs 2.2 ± 0.6) scores (P < .05). ID independently predicted lower exercise times (OR, 2.9; 95%CI, 1.1-7.6; P = .023) and worse QoL (OR, 1.9; 95%CI, 1.1-3.3; P < .001) but had no effect on cardiovascular morbidity or mortality.

Conclusions

ID, a prevalent condition in ACS patients, results in a poorer mid-term functional recovery, as measured by exercise capacity and QoL.

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1885-5857/© 2017 Sociedad Española de Cardiología. Published by Elsevier España, S.L.U. All rights reserved