Preventable sudden death in patients receiving angiotensin converting enzyme inhibitors and loop/potassium sparing...

Area of Science:

• Cardiology
• Pharmacology

Background:

• Angiotensin-converting-enzyme inhibitors (ACE inhibitors) are standard treatments for congestive cardiac failure.
• ACE inhibitors are often prescribed alongside diuretics.

Observation:

• Two patients experienced hyperkalemic cardiac arrest while using a fixed-combination diuretic (loop diuretic and potassium-sparing agent) with an ACE inhibitor.
• The mechanism of the cardiac arrest was investigated after successful resuscitation.

Findings:

• The combination of ACE inhibitors and specific proprietary diuretics was associated with life-threatening hyperkalemia.
• This specific drug interaction leading to cardiac arrest has not been previously reported.

Implications:

• Highlights the critical need for vigilant electrolyte monitoring in patients receiving ACE inhibitors, especially when co-prescribed with fixed-combination diuretics.
• Suggests a potential risk of hyperkalemic cardiac arrest with this medication combination.
• Informs clinical practice regarding the safe use of ACE inhibitors and combination diuretics.