Cohort study: Increased middle age serum sodium levels (may correlate with low water ingestion) are linked to increased risk of left ventricular hypertrophy and heart failure after 25 years of follow up.

Middle age serum sodium levels in the upper part of normal range and risk of heart failure – European Heart journal (link to abstract – $ for full-text)

News Release: Good hydration may reduce long-term risks for heart failure – Serum sodium levels may help identify adults with a greater chance of experiencing heart disease. – National Institutes of Health