Electrocardiogram manifestations of hyponatraemia

Area of Science:

• Cardiology
• Electrophysiology
• Internal Medicine

Background:

• Electrolytes are crucial for normal heart function and electrical activity.
• Electrolyte imbalances can disrupt myocardial cell depolarization and repolarization, leading to arrhythmias.
• Hyponatremia is the most frequent electrolyte disturbance observed in hospitalized patients.

Observation:

• A case study involving a patient diagnosed with acquired immune deficiency syndrome (AIDS) and decompensated cirrhosis.
• The patient presented with sinus arrest, a severe form of bradycardia, directly linked to hyponatremia.
• Electrocardiogram (ECG) findings were meticulously documented throughout the therapeutic process, correlating sodium levels with cardiac electrical activity.

Findings:

• Hyponatremia was identified as the direct cause of sinus arrest in this complex patient.
• The study details the specific ECG manifestations observed at varying serum sodium concentrations.
• Therapeutic interventions aimed at correcting hyponatremia led to the resolution of sinus arrest.

Implications:

• This case underscores the critical importance of monitoring electrolyte balance, particularly sodium levels, in patients with co-existing conditions like AIDS and cirrhosis.
• It highlights hyponatremia as a potentially life-threatening cause of cardiac arrhythmias, necessitating prompt diagnosis and management.
• Understanding the ECG changes associated with hyponatremia can aid clinicians in timely identification and treatment, improving patient outcomes.