Aims and Objectives: To examine whether chronic heart failure patient-carer dyads who disagree about the division of illness management tasks (incongruent) experience poorer psychosocial health and self-care, than those who agree (congruent).; Background: Informal carers often assist patients with chronic heart failure in the complex management of their illness, but little is known about how relationship dynamics may affect psychosocial health.; Design: A prospective cross-sectional study was adopted with a purposeful sample of 25 chronic h