Wang T, Danoviz J
J Electrocardiol. 1977 Apr;10(2):189-92. doi: 10.1016/s0022-0736(77)80053-8.
A case of atrial flutter whose classic "saw-tooth" morphology, resistant to full doses of digoxin and quinidine, was changed to an unusual form by low energy direct current shock is presented. The atrial and ventricular rates remained identical in spite of the different F wave pattern before and after attempted cardioversions. 0.5 mg digoxin was given after cardioversion failed and the patient reverted to normal sinus rhythm. This case strengthens the theory of rapidly discharging atrial focus as a mechanism of atrial flutter and the case for a change in intra-atrial conductions as cause for change in atrial electrograms.
本文报告一例心房扑动患者，其典型的“锯齿状”形态对足量的地高辛和奎尼丁耐药，经低能量直流电电击后转变为不寻常的形态。尽管在尝试心脏复律前后F波形态不同，但心房率和心室率保持一致。心脏复律失败后给予0.5mg地高辛，患者恢复为正常窦性心律。该病例强化了快速发放冲动的心房灶作为心房扑动机制的理论，以及心房内传导改变作为心房电图改变原因的观点。
