The Presence of J-Waves Is Associated with the Morphological and Functional Abnormality of Right Ventricle

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Objectives: We investigated the relation between ventricular morphology and function and J-wave. Methods: We reviewed twelve-leads ECG of consecutive 147 patients who underwent cardiac MRI. The morphological abnormality of ventricle was evaluated by the longest diameter in RV and LV (d-RVmax/d-LVmax) and the area (a-RVmax/a-LVmax), and the ratio of RV/LVmax by cardiac MRI. And the functional abnormality was evaluated by the contraction percentage of the area of RV (CP-RV). Results: Sixty-nine patients (47.2%) had J-waves defined as the QRS-ST junction elevation >0.1 mV from baseline in the inferior/lateral lead (J-group; 58±16 years, 46 men). Seventy-seven patients (52.8%) did not (NJ-group; 59±16 years, 54 men). The d-RVmax and a-RVmax in J-group was longer than in NJ-group (44±7.4 vs. 40±7.8 mm, p=0.001, 23±6.4 vs. 21±6.7 cm2, p=0.022). RV/LVmax in J-group is higher than in NJ-group (0.85±0.23 vs. 0.73±0.18, p<0.001). The CP-RV in J-group was lower than in NJ-group (0.27±0.13 vs. 0.34±0.16, p=0.014). The amplitude of J-waves was positively related to d-RVmax (p=0.004) and a-RVmax (p=0.012). Conclusions: The presence of J-wave is associated with the morphological and functional abnormality of RV.