Persistent hyperglycemia is associated with left ventricular dysfunction in patients with acute myocardial infarction

Area of Science:

• Cardiology
• Endocrinology
• Biomedical Science

Background:

• The impact of blood glucose levels on left ventricular (LV) dysfunction in patients with recanalized anterior acute myocardial infarction (AMI) is not fully understood.
• Early assessment of glycemic status is crucial for predicting cardiac outcomes.

Purpose of the Study:

• To investigate the association between persistent hyperglycemia and LV dysfunction in patients following successful recanalization for anterior AMI.
• To determine if sustained high blood glucose levels predict impaired cardiac function post-myocardial infarction.

Main Methods:

• Blood glucose was measured on admission and 24 hours post-symptom onset in 210 patients with anterior AMI treated within 6 hours.
• Hyperglycemia was defined as blood glucose ≥8.9 mmol/L.
• LV function was assessed before discharge using ejection fraction, with dysfunction defined as <40%.

Main Results:

• 142 patients had admission hyperglycemia, with 49 exhibiting persistent hyperglycemia at 24 hours.
• Persistent hyperglycemia was linked to higher incidences of impaired myocardial perfusion (myocardial blush grade 0/1) and elevated peak creatine kinase levels.
• Patients with persistent hyperglycemia showed significantly lower predischarge LV function (43±11%) compared to those without.

Conclusions:

• Persistent hyperglycemia at 24 hours post-symptom onset is an independent predictor of LV dysfunction in patients with recanalized anterior AMI.
• Sustained hyperglycemia is associated with poorer myocardial perfusion and impaired cardiac function before hospital discharge.