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Figure 3 Intraventricular Dyssynchrony in Control Subjects and in Patients With HF

Box and whisker plot for CMR-TSI in 20 healthy control subjects with a QRS <120 ms and in 66 patients with heart failure, grouped according to QRS <120 ms, QRS 120 to 149 ms, and QRS 150 ms. The 5 horizontal lines represent the 10th, 25th, 50th, 75th, and 90th percentiles, from bottom to top. CMR-TSI = cardiovascular magnetic resonance tissue synchronization index; HF = heart failure.