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根据心电图特征可将心房扑动分为两型:Ⅰ型为典型房扑,F波频率为240~340bpm,锐角向下,较常见;Ⅱ型较少见,F波频率在340~400bpm,波型呈圆凸向上。绝大多数房扑属于Ⅰ型,激动沿右心房三尖瓣环大折返逆钟向传导,F波负向,似倒置P波,频率多为300bpm,常伴规律2:1下传。这时常有一个F波与QRS波群(R波)部分重叠,另一个F波位于两个RR
Atrial flutter can be divided into two types based on the characteristics of electrocardiogram: type Ⅰ is typical atrial flutter, F wave frequency of 240 ~ 340bpm, acute angle down, more common; type Ⅱ is rare, F wave frequency of 340 ~ 400bpm, wave Type was convex upward. The vast majority of atrial flutter is type Ⅰ, excited along the right atrial tricuspid annulus turn bell reverse conduction, F wave negative, inverted P wave, the frequency of more than 300bpm, often accompanied by regular 2: 1 downlink. At this time, one F-wave often overlaps the QRS complex (R-wave), while the other F-wave is located between two RRs