Initial Changes in the Heart Conduction System Illustrated by Difference Map Patterns in Adolescent Patients After...

Area of Science:

• Cardiology
• Nephrology
• Medical Imaging

Background:

• Cardiovascular complications (CVCs) are a major risk in end-stage renal disease (ESRD) patients, increasing fatality.
• Kidney transplantation (KTx) improves patient status, but CVCs remain a significant risk, necessitating early identification.

Purpose of the Study:

• To investigate the impact of dialysis duration on cardiac conduction abnormalities in patients before and after KTx.
• To assess the utility of body surface potential mapping (BSPM) in diagnosing these abnormalities.

Main Methods:

• Studied 5 post-KTx patients, dialyzed before KTx, with a follow-up of 6.7 years.
• Utilized body surface potential mapping (BSPM) to analyze ventricular activation times (VATs) before and after KTx.
• Compared patient data with normal subjects and analyzed correlations between dialysis duration and VAT changes.

Main Results:

• Dialysis duration significantly correlated with the intensity of VAT changes, particularly in left anterior fascicle block (LAFB).
• VATs normalized in patients dialyzed for less than 1 year post-KTx.
• Patients dialyzed for over 1 year exhibited persistent conduction abnormalities on VAT maps.

Conclusions:

• Differences in VAT maps can diagnose initial heart activation propagation abnormalities.
• Short-term dialysis (<1 year) before KTx positively impacts heart conduction, leading to regression of changes.
• Long-term dialysis (>1 year) may result in persistent conduction abnormalities, requiring further investigation in larger cohorts.