Acute myocardial ischemia monitoring before and during angioplasty by a novel vectorcardiographic parameter set

CORREA, R.; ARINI, P.; CORREA, L.; VALENTINUZZI, M; LACIAR, E.

JOURNAL OF ELECTROCARDIOLOGY.

CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS

Lugar: Orlando; Año: 2013 vol. 46 p. 635 - 643

0022-0736

BackgroundThis work evaluates the vectorcardiographic dynamic changes in ischemic patients before and during Percutaneous Transluminal Coronary Angioplasty (PTCA).MethodsFour QRS-loop parameters were computed in 51 ischemic and 52 healthy subjects with the objective of assessing the vectorcardiographic differences between both groups: Maximum Vector Magnitude (QRSmVM), Planar Area (QRSPA), Maximum distance between Centroid and Loop (QRSmDCL) and Perimeter (QRSP).The conventional ST-Change vector magnitude (STCVM), QRS-Vector difference (QRSVD) and Spatial Ventricular Gradient (SVG) were also calculated. ResultsStatistical minute-by-minute PTCA comparison against a healthy population showed that ischemic patients monitoring is greatly enhanced when all the QRS-loop parameters, in combination with the standard STCVM, QRSVD and SVG indexes, are used in the classification. Sensitivity and Specificity, in turn, reached rather high values, 95.4% and 95.2%, respectively.ConclusionsThese new vectorcardiographic set of complementary QRS-loop parameters, when combined with the classics STCVM, QRSVD and SVG indexes, increase sensitivity and specificity for acute ischemia monitoring.