Abstract：Female, 75 years old, suffering from coronary disease and atrial fibrillation. The 24-hour Holter detection found intermittent appearance of wide and abnormal QRS complex，the time limit of which was 120 ms. There was no compensatory pause following QRS complex and RR intervals were unequal. It was diagnosed as intermittent intraventricular block while idioventricular rhythm couldn’t be excluded.By analyzing RR-Lorenz plot, part of points of the patient scatterred between atrioventricular node functional refractory period(AVNFRP) limit and X-axis, with the slope of B-line approaching zero. Therefore, the diagnosis was atrial fibrillation with idioventricular rhythm.
2013, Vol. 22 
