UNASSIGNED: To validate electrical cardiometry (EC) in pregnant @entity1 using transthoracic echocardiography (TTE) as the reference standard. To improve EC accuracy via a one-time, measurement of left ventricular outflow tract (LVOT) diameter. 44 non-laboring, resting @entity1 with singleton, viable pregnancies underwent simultaneous EC and TTE measurements. Data were analyzed using Bland-Altman analysis. Entry multiple regression with stepwise elimination was used to develop a model for improved prediction of @entity64 ( @entity64 ) using EC. Bootstrapping and an 11-fold cross validation were used to test the model. Heart rate by TTE and EC had a mean bias of 3.3  beats/min and mean percentage error of 10.7  %. Envelope time and left ventricular ejection time had a mean bias of -4.9  ms and mean percentage error 12.7  %. @entity64 volumes by the two techniques had a mean bias of 15.6  mL and mean percentage error of 43.7  %. A model, SVEC_Modified, predicting @entity64 was developed using LVOT area, @entity64 volume by electrical cardiometry and weight. @entity64 and SVEC_Modified had a mean bias of -0.83  mL and mean percentage error of 22  %. EC accurately measures heart rate and duration of systole when compared with TTE. @entity64 volume measurements correlate but have a high bias and percentage error. Knowledge of LVOT area, by a one-time, measurement with TTE, could improve prediction of @entity64 volume by EC.

A validation study of electrical cardiometry in pregnant XXXX using transthoracic echocardiography as the reference standard.

@entity1 :: ('9606', 'Species') :: ['women', 'patients'] @entity64 :: ('MESH:D020521', 'Disease') :: ['stroke volume by TTE', 'SVTTE', 'stroke', 'Stroke']
@entity1 :: (9606,Species) :: ['patients']
