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- W2370622022 abstract "Objective To observe the clinical and electrocardiogram(ECG)characters of patients with the depression of PR segment and ST segment before the premature atrial contraction(PAC).Methods The clinical and ECG characters of 332 cases,who had depression of PR segment and ST segment before the PAC(observation group),were analysed and compared with that no depression PR segment and ST segment before the PAC(the compared group).Results ① The lead distribution of the depression PR segment and ST segment before the PAC was wide and leads Ⅰ,Ⅱ,Ⅲ,aVF,V2～V6 were familiar.The occurrence frequency of V3 and V4 was the highest,and the depression of PR segment and ST segment of which were the most obvious.②The coupling interval(CI)of PAC in the observation group was short and fixed,and most of which had P on T phenomenon.The duration of PAC's P(P')wave was long.Its premature index(PI)was small and many P' waves were high-tip or with notch.Most of the PAC had depression PR segment and ST segment.The occurrence frequency of double PAC,continuously or paroxysmal atrial flutter and atrial fibrillation were higher.The cardiac cycles before PAC were mostly unstable.The voltage of sinus P wave was higher and the duration was longer.There was more intra atrial block.The differences between the data of the two groups were all very significant.Conclusion PR segment and ST segment depression before the PAC indicate unstable atrial electric activity.In this case,the PAC is high-risk and may develops into more serious atrial arrhythmias." @default.
- W2370622022 created "2016-06-24" @default.
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- W2370622022 date "2010-01-01" @default.
- W2370622022 modified "2023-09-23" @default.
- W2370622022 title "The clinical and ECG analysis of patients with depression of PR segment and ST segments before premature atrial contraction" @default.
- W2370622022 hasPublicationYear "2010" @default.
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