Profound spontaneous hypoglycaemia in congestive heart failure

Area of Science:

• Internal Medicine
• Cardiology
• Endocrinology

Background:

• Congestive heart failure (CHF) is a complex condition associated with various metabolic disturbances.
• Spontaneous hypoglycemia, a dangerous drop in blood sugar, has been observed in some CHF patients.
• The underlying mechanisms linking CHF and hypoglycemia require further elucidation.

Purpose of the Study:

• To report and analyze cases of spontaneous hypoglycemia in adult patients diagnosed with congestive heart failure.
• To investigate the clinical characteristics, underlying causes, and outcomes of these patients.
• To highlight the importance of monitoring blood glucose levels in CHF patients presenting with neurological symptoms.

Main Methods:

• Retrospective case series analysis of 11 adult patients with congestive heart failure and spontaneous hypoglycemia.
• Review of patient demographics, clinical presentations, blood glucose levels, underlying cardiac conditions, and mortality.
• Discussion of potential pathophysiological mechanisms contributing to hypoglycemia in this cohort.

Main Results:

• Eleven cases (5 male, 6 female, mean age 44) of spontaneous hypoglycemia (mean blood sugar 21 mg/100 ml) in CHF patients were identified.
• Underlying conditions included chronic obstructive lung disease, coronary heart disease, rheumatic valvular heart disease, and cardiomyopathy.
• Five out of 11 patients (45%) died, with presenting symptoms including coma (6) and confusion (1).

Conclusions:

• Spontaneous hypoglycemia is a significant and potentially fatal complication in patients with congestive heart failure.
• A combination of factors including liver dysfunction, poor nutrition, malabsorption, and increased glucose utilization by ischemic tissues likely contributes to hypoglycemia.
• Prompt blood glucose measurement is crucial for CHF patients exhibiting altered consciousness or confusion to enable timely diagnosis and management of hypoglycemia.