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Prevalence of major (A) and minor (B) ECG abnormalities in 65 patients with pulmonary hypertension in the PAPUCO registry compared to 285 controls with normal Doppler echocardiography and right ventricular systolic pressure. RBBB; right bundle branch block, QRS right-axis deviation = QRS axis > 100°. *p < 0.05, **p < 0.01, ***p < 0.001.
