Type 1 diabetes is associated with T-wave morphology changes. The Thousand & 1 Study

Area of Science:

• Cardiology
• Diabetology
• Electrophysiology

Background:

• Type 1 diabetes mellitus (T1DM) is associated with impaired cardiac repolarization.
• Repolarization disturbances in T1DM increase mortality risk.
• Cardiac repolarization is often assessed via T-wave morphology.

Purpose of the Study:

• To investigate T-wave morphology in T1DM patients without known heart disease.
• To identify potential cardiac repolarization markers in T1DM.
• To explore the relationship between T-wave morphology and albuminuria in T1DM.

Main Methods:

• A case-control study involving 855 T1DM patients matched with 1710 controls.
• Analysis of rate-corrected T-wave morphology markers.
• Stratification of T1DM patients based on albuminuria levels (normo-, micro-, macroalbuminuria).

Main Results:

• T-waves were significantly flatter and more asymmetric in T1DM patients compared to controls.
• Albuminuria in T1DM was associated with increased heart rate.
• Increased T-wave asymmetry was observed with increasing albuminuria levels, while QTc interval remained unchanged.

Conclusions:

• T1DM is characterized by distinct changes in T-wave morphology.
• T-wave asymmetry, not QTc interval, is associated with albuminuria in T1DM.
• T-wave asymmetry may serve as a useful marker for stratifying T1DM patients.