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心脏电生理检查虽是诊断心动过速最准确的方法,但需要一定的设备,且需花费较长的时间,对急症患者不太实用。体表心电图对阵发性心动过速的诊断正确率为70～80%,由于其应用方便,故在目前仍为重要的诊断手段。一、阵发性室上速(PSVT) 起源于希氏束分叉以上的心动过速统称为室上速,心电图表现为QRS时间正常。PSVT具有骤然发作与骤然终止的特点,心率一般为150～220次/分。临床上最常见的PSVT为房室折返性心动过速(AVNRT,约占60%),其次为房室反复
Although cardiac electrophysiology is the most accurate way to diagnose tachycardia, it requires some equipment and takes a long time and is not practical for emergency patients. Surface ECG on the diagnosis of paroxysmal tachycardia correct rate of 70 to 80%, due to its ease of use, it is still an important diagnostic tool. First, the paroxysmal supraventricular tachycardia (PSVT) originated in the His bundle branch tachycardia, collectively referred to as supraventricular tachycardia, ECG showed normal QRS time. PSVT has the characteristics of sudden onset and abrupt termination, heart rate is generally 150 to 220 beats / min. The most common clinical PSVT is atrioventricular reentrant tachycardia (AVNRT, accounting for about 60%), followed by atrioventricular repeated