Left atrial dysfunction can independently predict exercise capacity in patients with chronic heart failure who use beta-blockers

Table 3 Receiver operating characteristic curve analysis of the parameters with the greatest area under the curve

Variable	Cutoff value	Sensitivity (%)	Specificity (%)	AUC	95%CI	P
LA reservoir strain	24.9%	74.29	63.16	0.70	0.59 to 0.81	< 0.001***
LA conduit strain	− 7.9%	40.00	92.11	0.61	0.49 to 0.72	0.097
LA booster strain	− 8.0%	60.00	84.21	0.69	0.57 to 0.80	0.003**
LVEF	38.9%	45.71	81.58	0.59	0.47 to 0.71	0.189
TAPSE	18 mm	51.52	74.19	0.56	0.43 to 0.69	0.396

**P < 0.01; *** P < 0.001
AUC, area under the curve; CI, confidence interval; LA, left atrial; LVEF, left ventricular ejection fraction; TAPSE, tricuspid annular plane systolic excursion

ISSN: 1471-2261