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. Author manuscript; available in PMC: 2010 Aug 25.
Published in final edited form as: J Am Coll Cardiol. 2009 Aug 25;54(9):840–850. doi: 10.1016/j.jacc.2009.06.008

Table 3.

Multiple Regression Analysis Between Direct Sympathetic Nerve Activity and QT Data After Pacing-Induced CHF

ln 300 s iSGNA
 ln 300 s iVNA
 Intercept
R R2 p Value β SE Beta p Value β SE Beta p Value β SE p Value
RRm, ms — — 0.106 — — — 0.119 — — — 0.106 — — 0.090
RRv, ln ms2 — — 0.073 — — — 0.642 — — — 0.095 — — 0.056
QTm, ms 0.42 0.18 0.010 0.010 0.004 0.42 0.010 — — — 0.320 0.19 0.02 0.0001
QTv ln ms2 0.49 0.24 0.002 0.008 0.003 0.49 0.002 — — — 0.940 1.9 0.30 0.0001
QTcBazett 0.55 0.30 0.0001 0.018 0.005 0.55 0.001 — — — 0.503 0.19 0.02 0.0001
QTcFridericia 0.59 0.35 0.0001 0.015 0.003 0.59 0.0001 — — — 0.482 0.19 0.01 0.0001
QTcTabo 0.58 0.34 0.0001 0.016 0.004 0.58 0.0001 — — — 0.466 0.19 0.02 0.0001
QTc Van de Water 0.59 0.35 0.0001 0.013 0.003 0.59 0.0001 — — — 0.450 0.20 0.01 0.0001
QTcFramingham 0.54 0.30 0.0001 0.016 0.005 0.52 0.0001 — — — 0.489 0.20 0.02 0.0001
QTVI 0.57 0.32 0.010 0.27 0.13 0.34 0.01 — — — 0.308 33.6 0.60 0.0001

Bold values indicate a statistical significance.

QTVI = QT variability index; other abbreviations as in Table 1.