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- W1979449939 abstract "Although the influence of CABG on the autonomic nervous system has been well documented in studies using pre- and postoperative HRV analysis, the impact of CABG on QT dynamicity has not been studied. QT dynamicity that can be measured by the slope of the linear regression of QT/RR, reflects abnormal rate adaptation of ventricular repolarization. This study evaluated the effects of CABG on QT interval dynamicity in subjects with coronary artery disease. The study group consisted of 47 consecutive patients with coronary artery disease who underwent elective CABG. All subjects had a complete history, laboratory examination and transthorasic echocardiography. Twenty-four-hour Holter monitoring was performed 2 to 5 days before cardiac surgery and was repeated 10 days after CABG. Recordings, which were obtained using 3-channel analog recorders and analyzed using the ELATEC hoter system, were used to calculate mean heart rate and QT dynamicity parameters. Mean value of left ventricular ejection fraction was 53.3±7.1. Qtend/RR and qtapex/RR slope were significantly increased in the early postoperative period after CABG (qtapex/RR: 0,15±0,12, 0,27±0, p=0.001; qtend/RR: 0.17±0.21, 0.35±0.23, p<0.001) (Table 1). CABG was associated with a significant worsening of QT dynamicity parameters in the early postoperative period. Perioperative damage of autonomic nervous fibers, may play a role in QT dynamicity worsening." @default.
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- W1979449939 date "2005-10-01" @default.
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- W1979449939 title "Alteration of QT Dynamicity After CABG" @default.
- W1979449939 doi "https://doi.org/10.1016/j.eupc.2005.08.206" @default.
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