Table 3.

Detections of LVSD in Patients with QRS Duration < 120 ms N = 40 Positive, Negative N = 78

Acoustic Cardiographic Parameter	AUC	Sensitivity at 90% Specificity	Additional LVSD Patients Detected*
S3 Strength	0.65	33% (4.4)	13 (28%)
% EMAT	0.79	38% (12.5)	15 (33%)
QRSdur* Qrint* S3Strength*%EMAT	0.83	70% (166,585)	28 (61%)

*Compared to the LVSD patients detected in the entire population by QRS Duration >120 ms.

AUC = area under the receiver operating characteristic curve; EMAT = electromechanical activation time; LVSD = left ventricular systolic dysfunction.