Quantitative fragmented QRS has a good diagnostic value on myocardial fibrosis in hypertrophic obstructive cardiomyopathy based on clinical-pathological study

Table 3 Predictive ability of each examination to discriminate HOCM patients with high CVF from those with normal CVF

	AUC	95%CI	Cutoff value	Sensitivity,%	Specificity,%	PPV,%	NPV,%	Accuracy,%
Q-fQRS	0.747	0.611–0.838	7	66.7	76.7	78.8	63.9	71
The numer of leads with fQRS	0.729	0.594–0.825	3	59	80	79.3	60	68.1
LGE at 6SD	0.741	0.617–0.843	6.22	68.6	72.4	75	65.6	70.3

AUC area under curve, CI confidence interval, CVF collagen volume fraction, NPV negative predictive value, LGE late gadolinium, PPV positive predictive value, Q-fQRS quantitative fragmented QRS, SD standard deviation;

ISSN: 1471-2261