Analysis of substancesCurrentoverviewElectrocardiographic (ECG) P-wave analysis has long been used to study the atrial electrical activity in the heart. Scalar and vectorial P-wave measurements have been proposed to delineate the atrial electrical phenomena and to estimate atrial volumes and function. ...
In the present study we evaluated the upslope (IUS), downslope (IDS) and terminal slope (ITS) of the QRS complex in both standard and derived ECG leads obtained from spatial QRS loops, either by the vectorcardiogram (VCG) or by principal component analysis (PCA), in 79 patients undergoing...