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A Pre-Clinical Porcine Model of Orthotopic Heart Transplantation
Published on: April 27, 2019
The corrected QT interval before and after heart transplantation
Jeremy P Moore1, Juan C Alejos, Gregory Perens
1Pediatric Cardiology, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California, USA. jpmoore@mednet.ucla.edu
The American Journal of Cardiology
|August 8, 2009
Summary
Donor brain injury impacts corrected QT (QTc) intervals, complicating long-QT syndrome screening. Gunshot wounds correlate with shorter QTc intervals, aiding donor assessment and post-transplant arrhythmia prevention.
Area of Science:
- Cardiology
- Transplantation Medicine
- Neurology
Background:
- Severe neurologic injuries in heart donor candidates are linked to prolonged corrected QT (QTc) intervals.
- This complicates screening for cardiac repolarization abnormalities like long-QT syndrome.
- Establishing normal QTc values and associated factors is crucial for donor assessment.
Purpose of the Study:
- To determine normal pre- and post-transplantation QTc intervals in heart donors and recipients.
- To identify factors associated with QTc interval prolongation in this cohort.
- To inform pre-transplantation donor assessment and post-transplantation management.
Main Methods:
- Retrospective review of medical records for 179 donors and 112 recipients.
- Analysis of historical, electrocardiographic, and neuroimaging data.
- Linear regression analysis to identify factors associated with QTc interval prolongation.
Main Results:
- Gunshot wounds were associated with the shortest mean pre-transplantation QTc intervals (447 ± 51 ms).
- Other brain injury mechanisms showed markedly prolonged pre-transplantation QTc intervals.
- Post-transplantation, mean QTc decreased, mean QRS duration increased, and hypokalemia was linked to prolonged QTc.
Conclusions:
- The mechanism of donor brain injury significantly influences pre-transplantation QTc intervals.
- Shortest QTc intervals are associated with gunshot wounds, aiding donor selection.
- Findings support tailored post-transplantation management to prevent ventricular arrhythmias.
