Key result
Right ventricular overload in infants is linked to distinct abnormal QRST isointegral map patterns.
Why the study?
Electrocardiographic criteria for right ventricular hypertrophy in infants generally exhibit low sensitivity for diagnostic accuracy.
Does QRST isointegral mapping detect the presence and pattern of right ventricular overload in infants under 2 years old compared to healthy controls?
Case-Control
Does QRST isointegral mapping detect the presence and pattern of right ventricular overload in infants under 2 years old compared to healthy controls?
QRST isointegral mapping can identify and differentiate patterns of right ventricular overload in infants with congenital heart defects.
QRST mapping may flag RV overload patterns in infants under 2; hypothesis-generating and requires prospective validation before any clinical role.
Electrocardiographic criteria for right ventricular (RV) hypertrophy in infants generally exhibit low sensitivity in terms of diagnostic accuracy. We studied the QRST isointegral map (QRST-Imap) of body surface potential distribution for the diagnosis of RV overload in patients less than 2 years old. Patients with atrial septal defect (ASD), pulmonary stenosis (PS) and tetralogy of Fallot (TOF) were examined (RV overload group) and the findings of their QRST-Imaps were compared to those of age-matched healthy infants (NOR). QRST-Imaps in RV overload showed abnormal findings, with two maxima or a rightward shift of the maximum with increased amplitude, in contrast to one maximum at the left anterior chest with a single dipole pattern in the NOR group. ASD patients had two maxima with a decreased integral value between them. In PS, two maxima were also observed, with increased integral values of the right maximum as the RV systolic pressure was elevated. TOF patients showed a single maximum shifted to the anterior median line with increased amplitude. These results indicate that the findings of QRST-Imaps are of value in detecting the presence and pattern of RV overload in infants.
No takes yet. Share an insight, caveat, or question.
Izumida et al. (1993) conducted a case-control in Right ventricular overload. Right ventricular overload vs. Age-matched healthy infants was evaluated on QRST isointegral map patterns. Right ventricular overload in infants under 2 years old was associated with abnormal QRST isointegral map patterns, such as two maxima or a rightward shift, compared to healthy controls.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: