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- W1970680945 abstract "Plasma levels of atrial natriuretic factor (ANF) and norepinephrine are markedly elevated during episodes of ventricular tachycardia. Although atrial distention appears to be the major stimulus for ANF release, reflex changes in autonomic tone might also contribute. Plasma ANF and norepinephrine levels, sinus node cycle length, systolic blood pressure, and mean right atrial pressure were therefore assessed during rapid right ventricular pacing at 150 beats/min for 10 minutes. In five patients (group 1) observations were made without autonomic blockade, and another five patients (group 2) had ventricular pacing after cardiac autonomic blockade. In group 1 systolic blood pressure fell during ventricular pacing from 122 +/- 4 to 105 +/- 5 mm Hg (p < 0.02), norepinephrine levels increased from 195 +/- 26 to 411 +/- 71 pg/ml (p < 0.02), and sinus node cycle length decreased from 936 +/- 99 to 688 +/- 58 msec (p < 0.02). Right atrial pressure was elevated from 2.6 +/- 0.6 to 7.4 +/- 0.6 mm Hg (p < 0.02), and ANF levels increased from 161 +/- 23 to 240 +/- 26 pg/ml (p < 0.05). Whereas systolic blood pressure, norepinephrine, sinus cycle length, and right atrial pressure returned promptly to baseline levels when ventricular pacing was stopped, ANF levels continued to rise (296 +/- 37 pg/ml; p < 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1970680945 date "1993-06-01" @default.
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- W1970680945 title "Atrial natriuretic factor release during rapid ventricular pacing: Interplay between autonomic and hemodynamic stimulants" @default.
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- W1970680945 doi "https://doi.org/10.1016/0002-8703(93)90753-v" @default.
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