Table 1.

Key search terms used in the review

Key search terms*
Concept 1	Palliative care OR Terminal care OR Long-term care OR End of life care OR Hospice OR Advance care planning
Concept 2	Heart failure OR Cardiac failure OR Ventricular dysfunction OR Low cardiac output OR Dilated cardiomyopathy OR Congestive cardiomyopathy OR Cardiogenic shock
Concept 3	Tool OR Survey OR Questionnaire OR Checklist OR Inventory OR Scale OR Instrument OR Indicator OR Measure OR Index OR Model OR Criteria OR Calculator OR Score
Filters/limits
Population	Human
Language	English or Arabic
Study design	Empirical research
Date	No limits
Settings	No limits

*These terms are not exhaustive. An example of a comprehensive search strategy for EMBASE (Ovid) is shown in Supplemental Table 1