The Application of Root Mean Square Electrocardiography (RMS ECG) for the Detection of Acquired and Congenital Long QT Syndrome
Figure 10
Measured and patient-specific rate corrected QTRMS and RTPK derived from 24-hour. Holter recordings in a subset of pediatric LQTS subjects.
Panel A, The mean 10 min averaged QTRMS and RTPK intervals for 7 LQTS subjects are plotted versus corresponding cycle length, highlighting a mostly linear relationship. Panel B, QTRMS and RTPK values were corrected for heart rate using a patient-specific linear fit to the QTRMS and RTPK versus cycle length relationship. Similar to data obtained in adult subjects, the patient-specific heart rate corrected QTRMS and RTPK intervals did not vary with cycle length.