{"title":"冠状动脉搭桥手术患者的单次心率和QT间期变异性","authors":"S. Frljak, V. Avbelj, R. Trobec, B. Geršak","doi":"10.1109/CIC.2002.1166859","DOIUrl":null,"url":null,"abstract":"Non-uniform recovery of myocardial excitability may be essential in triggering malignant ventricular tachycardia in patients after cardiac surgery. Beat-to-beat heart rate and QT interval variability was investigated in 27 patients scheduled for elective coronary artery bypass graft surgery (CABG) and 20 control subjects. 35 channel ECG was recorded for 6 minutes, followed by off line computer analysis. Heart rate interval duration, RR SD, QT SD and power spectra of RR variability were computed from 256-second stable heart rate and QT interval series using MECG software. Study showed that CABG caused increased QT interval variability in face of nearly constant or slowly changing heart rate, suggesting a loss of autonomic coupling between heart rate and ventricular repolarization for sympathovagal modulation.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"661-664"},"PeriodicalIF":0.0000,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166859","citationCount":"3","resultStr":"{\"title\":\"Beat-to-beat heart rate and QT interval variability in patients undergoing coronary artery bypass graft surgery\",\"authors\":\"S. Frljak, V. Avbelj, R. Trobec, B. Geršak\",\"doi\":\"10.1109/CIC.2002.1166859\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Non-uniform recovery of myocardial excitability may be essential in triggering malignant ventricular tachycardia in patients after cardiac surgery. Beat-to-beat heart rate and QT interval variability was investigated in 27 patients scheduled for elective coronary artery bypass graft surgery (CABG) and 20 control subjects. 35 channel ECG was recorded for 6 minutes, followed by off line computer analysis. Heart rate interval duration, RR SD, QT SD and power spectra of RR variability were computed from 256-second stable heart rate and QT interval series using MECG software. Study showed that CABG caused increased QT interval variability in face of nearly constant or slowly changing heart rate, suggesting a loss of autonomic coupling between heart rate and ventricular repolarization for sympathovagal modulation.\",\"PeriodicalId\":80984,\"journal\":{\"name\":\"Computers in cardiology\",\"volume\":\"1 1\",\"pages\":\"661-664\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-09-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1109/CIC.2002.1166859\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computers in cardiology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/CIC.2002.1166859\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers in cardiology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CIC.2002.1166859","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Beat-to-beat heart rate and QT interval variability in patients undergoing coronary artery bypass graft surgery
Non-uniform recovery of myocardial excitability may be essential in triggering malignant ventricular tachycardia in patients after cardiac surgery. Beat-to-beat heart rate and QT interval variability was investigated in 27 patients scheduled for elective coronary artery bypass graft surgery (CABG) and 20 control subjects. 35 channel ECG was recorded for 6 minutes, followed by off line computer analysis. Heart rate interval duration, RR SD, QT SD and power spectra of RR variability were computed from 256-second stable heart rate and QT interval series using MECG software. Study showed that CABG caused increased QT interval variability in face of nearly constant or slowly changing heart rate, suggesting a loss of autonomic coupling between heart rate and ventricular repolarization for sympathovagal modulation.
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