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1心电图特点1.1急诊心动过速发作时的心电图特点未见P波,心动过速频率快,平均178次/分,QRS波的形态和时间呈多样性;R-R间距绝对不等,不整齐,长R-R间距400ms,短R-R间距200ms,差异达200ms;宽QRS波,时间约120ms,QRS波起始部粗顿,ST段、T波改变。1.2急诊电复律后的心电图特点P-R间
1 Electrocardiogram characteristics 1.1 Emergency tachycardia ECG characteristics of the absence of P wave, fast tachycardia frequency, an average of 178 beats / min, QRS wave morphology and time showed a diversity; RR interval is absolutely unequal, irregular, long RR interval of 400ms, short RR interval of 200ms, the difference of up to 200ms; wide QRS wave, the time of about 120ms, the beginning of the QRS wave, Dayton, ST segment, T wave changes. 1.2 emergency cardioversion electrocardiogram characteristics P-R between