The Selvester QRS score can be applied to the 12-lead ECG once the acute ST-segment deviation has resolved to estimate infarct size in both anterior and inferior ventricular locations.
In this study, we applied the QRS score to patients surviving a first acute myocardial infarction.
When we assessed the relationships between QRS score and the indices of LV function obtained by Echocardiography performed at the time of ICCU discharge, QRS Score was inversely correlated with LVEF (r= -0.5834; P <0.0001; Fig.
Table IV shows the relation between QRS Score and LVEF.
The QRS Score of > 6 predicted a left ventricular ejection fraction of < 50% with a sensitivity of 79.2% (CI 65 to 89.5) and specificity of 70.2% (CI 53.5 to 83.4).
The researchers used the total QRS score to take measures of parenting stress at Time 1, which indicated a mean score of 28.1 (SD = 6.6), and at Time 2, which revealed that total stress had fallen to 24.8 ([+ or -] 7.6).
Table 3 shows the relationship among the children's behavior problems (as rated by the scales of the CRS-R), autistic severity (total GARS score), intellectual functioning (General Cognitive Ability score from the BAS) and adaptive behavior (VABS composite score), as well as the levels of parenting stress (the total QRS score) at Time 1 and at Time 2.
The researchers took measures of parenting stress that used the total QRS score at Time 1, when the results revealed a mean total QRS score of 24.4 ([+ or -] 9.3), and at Time 2, which showed that the mean total QRS stress had fallen to 21.3 ([+ or -] 7.5).
Table 6 shows the semipartial correlations between parenting stress (as measured by the total QRS score and the total PSI score) and each of the child behavior problems (as rated by the DBC), autistic severity (GARS total score), intellectual functioning (BAS general cognitive ability score), and adaptive behavior (VABS composite score) at Time 1.
To obtain an indication of the possible temporal precedence between parenting stress and child behavior problems, the researchers split the sample into lower and higher parenting-stress groups on the basis of the total QRS score (lower stress, n = 46, mean QRS = 18.8 [+ or -] 5.4; higher stress, n = 26, mean QRS = 34.2 [+ or -] 5.7) and lower and higher parenting stress groups on the basis of the total PSI score (lower stress, n = 42, mean PSI = 265.3 [+ or -] 25.3; higher stress, n = 30, mean PSI = 325.9 [+ or -] 28.3) at Time 1, using a split at the mean in both cases.