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The idea of sodium restriction for patients with heart failure is well ingrained in teaching and practice. And yet, compliance with this recommendation is low, and the evidence underlying it is weak. To better characterize the literature addressing interventions reducing dietary salt in adults with heart failure, investigators in the U.K. conducted a systematic review, identifying nine relevant studies (2 with inpatients and 7 with outpatients) involving 479 people.
None of the studies included more than 100 participants. None had a low risk of bias across all seven domains examined. None of the studies provided sufficient data on cardiovascular mortality. Many studies were missing key information, thus precluding meta-analysis because of a …