Chloride in Heart Failure: The Neglected Electrolyte

Area of Science:

• Cardiology
• Nephrology
• Electrolyte Balance

Background:

• Heart failure (HF) presents a growing global health challenge.
• Chloride's role in fluid balance and its connection to cardiorenal and neurohormonal systems are increasingly recognized.
• Emerging evidence suggests chloride levels are prognostic in HF patients.

Purpose of the Study:

• To review the pathophysiology of chloride abnormalities in HF.
• To evaluate the impact of HF treatments on chloride levels.
• To discuss the association between chloride levels and HF mortality.

Main Methods:

• Literature review of existing studies on chloride, electrolytes, and heart failure.
• Analysis of the interplay between chloride, HF pathophysiology, and neurohormonal axes.
• Examination of data linking serum chloride levels to clinical outcomes in HF.

Main Results:

• Chloride plays a critical role in maintaining fluid homeostasis and influences HF progression.
• Diuretic therapy, commonly used in HF, can lead to hypochloremia due to increased urinary chloride excretion.
• Elevated serum chloride levels are associated with increased mortality risk in heart failure patients.

Conclusions:

• Chloride is a significant electrolyte implicated in HF pathophysiology and progression.
• Monitoring chloride levels is crucial for managing HF patients, especially those on diuretic therapy.
• Chloride levels serve as an important prognostic indicator in heart failure, warranting further clinical investigation.