A Case Report on QTc Prolongation: Understanding the Medication Risks and Electrolyte Imbalance

Area of Science:

• Cardiology
• Clinical Pharmacology

Background:

• QTc prolongation is a significant risk factor for potentially fatal ventricular arrhythmias and sudden cardiac death.
• Acquired QTc prolongation is common in clinical practice, often linked to specific medications and metabolic disturbances.

Observation:

• A 79-year-old female with comorbidities presented with syncope, exhibiting a markedly prolonged QTc interval on electrocardiogram.
• Her condition was exacerbated by amiodarone use and acute electrolyte imbalance, possibly due to recent diuretic use.

Findings:

• Discontinuation of amiodarone and electrolyte repletion led to a rapid normalization of the QTc interval.
• The patient remained free of syncopal episodes within two days of intervention.

Implications:

• This case highlights the critical need for vigilant monitoring of amiodarone therapy and electrolyte balance to prevent severe QTc prolongation.
• Understanding medication risks and potential side effects is crucial for avoiding serious cardiac complications like sudden cardiac death.