Sodium intake modulates left ventricular hypertrophy in essential hypertension

Area of Science:

• Cardiology
• Hypertension Research
• Clinical Nutrition

Background:

• Left ventricular hypertrophy (LVH) is a significant risk factor for cardiovascular events.
• The role of dietary sodium in LVH development among hypertensive individuals requires further elucidation.

Purpose of the Study:

• To investigate the association between dietary sodium intake and left ventricular hypertrophy.
• To determine if sodium excretion is an independent predictor of LVH in patients with essential hypertension.

Main Methods:

• Two-dimensionally guided M-mode echocardiography was used to measure cardiac parameters.
• 24-hour urinary sodium excretion was assessed in two independent cohorts of hypertensive patients.
• Stepwise multiple regression analysis was employed to identify independent determinants of LVH.

Main Results:

• Sodium excretion positively correlated with posterior wall thickness, relative wall thickness, and left ventricular mass in the New Orleans cohort.
• Sodium excretion was independently associated with posterior wall thickness and relative wall thickness, irrespective of age, arterial pressure, and body weight.
• In the Bonn cohort, sodium excretion correlated with diastolic diameter and left ventricular mass, and emerged as an independent predictor alongside systolic pressure.

Conclusions:

• Dietary sodium intake is a powerful, independent determinant of left ventricular hypertrophy in patients with essential hypertension.
• Salt restriction may be a valuable strategy to mitigate cardiac structural adaptation in hypertensive individuals.
• These findings highlight the crucial role of sodium management in preventing or reversing LVH.