PMID: 6160503Mar 1, 1980Paper

Temporary pacemaker treatment in open heart surgery: pre- to postoperative changes in the electrogram characteristics

Pacing and Clinical Electrophysiology : PACE
O J Ohm, E Skagseth

Abstract

Thirty-three patients undergoing cardiac surgery in general hypothermia were investigated during temporary pacemaker treatment for changes in right ventricular electrogram amplitudes (AMAX, UMAX) and maximum derivatives (DMAX, SMAX) from pre-to postoperative phase (AMAX = amplitude of the part of the electrogram with highest mean maximum derivative (SMAX), DMAX = maximum derivative, UMAX = maximum amplitude deflection). Standard commercially available electrodes were used in 28 of the patients. A paired comparison (n = 29) showed a fall in AMAX from 8.64 +/- 0.91 mV (mean +/- SEM) preoperatively to 4.94 +/- 0.43 mV (p < 0.001) between the 4th and 6th postoperative day; UMAX dropped from 11.09 +/- 0.95 mV preoperatively to 5.44 +/- 0.42 mV (p < 0.000001) from the fourth to the sixth postoperative day. In the same period DMAX fell from 1.57 +/- 0.13 V/s to 0.67 +/- 0.05 V/s (p < 0.000001), and SMAX from 0.76 +/- 0.06 V/s to 0.32 +/- 0.02 V/s (p < 0.000001). The most marked fall in amplitudes and maximum derivatives occurred during the first 24 hours. A slight, but nonsignificant increase occurred in amplitudes and maximum derivatives from the 4th to 6th postoperative day until the electrodes were removed the 10th to 19th postoper...Continue Reading

References

Apr 1, 1977·The American Journal of Cardiology·P J HofschireJ H Moller
Jun 1, 1977·American Heart Journal·S FurmanV De Caprio
Jun 20, 1970·Lancet·K ChatterjeeA Leatham
Nov 5, 1959·The New England Journal of Medicine·S FURMAN, J B SCHWEDEL

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Citations

Mar 31, 2005·The Annals of Thoracic Surgery·Shafqat Hasan, C Terence Lewis
Dec 1, 1995·The Journal of Thoracic and Cardiovascular Surgery·O J OhmH Engedal
Jul 1, 1982·Pacing and Clinical Electrophysiology : PACE·K BreivikO J Ohm

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