ArticleQuantitative imaging in medicine and surgery2025
Relationships between QRS duration and left ventricular deformation in hypertrophic cardiomyopathy.
Article in Quantitative imaging in medicine and surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: QRS duration has been recognized as a risk factor for ventricular arrhythmias in hypertrophic cardiomyopathy (HCM), but its role in reflecting left ventricular (LV) function and morphology is unknown. We aimed to investigate the relationship between QRS duration and strain values in hypertrophic nonobstructive cardiomyopathy (HNCM) and hypertrophic obstructive cardiomyopathy (HOCM). Methods: A total of 45 HNCM patients and 81 HOCM patients with preserved ejection fraction were retrospectively enrolled in this study. The QRS duration was measured using standard 12-lead electrocardiograms. LV global and segmental strain analyses were performed using cardiac magnetic resonance feature tracking. Results: The QRS duration correlated with global circumferential (GCS, r=0.386, P=0.013), radial (GRS, r=-0.374, P=0.016) and longitudinal (GLS, r=0.3462, P=0.026) strain in HNCM patients, whereas it was correlated with GCS (r=0.253, P=0.036) and GRS (r=-0.257, P=0.033) in HOCM patients. In patients with a QRS duration ≥110 ms, the global radial peak strain (PS, 30.69%±12.74% Conclusions: The QRS duration increases with global and segmental impairments in both HNCM and HOCM patients. Prolonged QRS duration may serve as an indicator of apical deformation in HNCM patients and as an indicator of mid-wall involvement in HOCM patients.
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