Noninvasive Detection of Left-Ventricular Systolic Dysfunction by Acoustic Cardiography in Atrial Fibrillation

Table 2

Performances of EMAT, SDI, and EF to detect LVSD.

Parameter	Group	% Sensitivity	% Specificity	Pos LR	Neg LR
EMAT@110	No AFib	30	96	7.8	1.4
	Afib	64	82	3.6	2.3
[email protected]	No Afib	40	90	4.0	1.5
	Afib	59	100	59	2.4
EF@35%	No Afib	30	96	7.8	1.4
	Afib	45	82	2.6	1.5
EF@50%	No Afib	69	81	3.6	2.6
	Afib	64	76	2.7	2.1

EMAT: electromechanical activation time, msec; SDI: systolic dysfunction index; EF: ejection fraction, %; LVSD: left ventricular systolic dysfunction, defined as LV max(dP/dt) < 1600 mmHg/s, Afib: atrial fibrillation, Pos LR: positive likelihood ratio, Neg LR: negative likelihood ratio.