Frailty-targeted cardiac rehabilitation improves function, not survival, meta-analysis finds

A systematic review and meta-analysis of 16 studies (13 randomised controlled trials and 3 non-randomised studies of interventions; 1,716 participants) evaluated cardiovascular rehabilitation and management interventions specifically targeted at older adults with cardiovascular disease and frailty. Pooled results found significant improvement in adjusted Short Physical Performance Battery scores, six-minute walk distance, frailty burden and lower-limb strength, and a lower rate of physical-performance decline. There was no significant effect on unadjusted physical-performance scores, handgrip strength, Barthel Index scores, or all-cause mortality; hospitalisation and quality-of-life outcomes could not be pooled because of inconsistent definitions across the included studies. Meta-analysis The review authors rate the certainty of evidence as very low throughout, citing a limited evidence base, risk of bias, heterogeneity and imprecision, and describe the findings as exploratory rather than establishing clinically meaningful benefit.

The distinction matters for how this evidence gets used. Frailty-targeted cardiac rehabilitation has a genuine, if uncertain, functional case — measurable gains in mobility and physical performance for a population often excluded from standard cardiac rehabilitation pathways. It does not yet have a survival or hospitalisation case: the outcomes that would justify commissioning cardiac rehabilitation for frail patients on admission-avoidance or mortality-reduction grounds were not demonstrated in this pooled analysis. Services extending cardiac rehabilitation to frailer, older populations should treat the functional benefit as the evidenced outcome, and treat any claim of reduced admissions, extended survival or preserved independence beyond physical performance as still unproven.