Key result
Regional ischemic K+ accumulation impacts T wave pseudonormalization more than exercise-induced K+ in HCM models.
Why the study?
Pseudonormal T waves occur on stress ECGs in HCM, but the precise electrophysiological mechanisms underlying whether this is caused by myocardial ischaemia or exercise-induced changes remain unknown.
Does regional ischaemic K+ accumulation or exercise-induced changes cause T wave pseudonormalisation in computational models of hypertrophic cardiomyopathy?
Does regional ischaemic K+ accumulation or exercise-induced changes cause T wave pseudonormalisation in computational models of hypertrophic cardiomyopathy?
In computational models of HCM, regional ischaemic K+ accumulation causes T wave pseudonormalisation before significant ST segment changes, suggesting it may be an early ECG feature of myocardial ischaemia.
Authors
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May flag early ischaemia in HCM models; leaves open translation to clinical ECG monitoring.
Coleman et al. (2023) studied Hypertrophic cardiomyopathy (n=20). Regional ischaemic K+ accumulation, global exercise-induced serum K+ increases, and/or increased pacing frequency vs. Baseline was evaluated on ECG biomarkers including ST segments, T wave amplitudes, and QT intervals. Regional ischaemic K+ accumulation had a greater impact on T wave pseudonormalisation than exercise-induced serum K+ increases in computational models of hypertrophic cardiomyopathy.
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