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奎尼丁治疗期间,心电图可出现宽大QRS波,S—T段下移,T波低平,P波切迹和Q—T间期延长。这多认为是治疗反应,而非中毒现象。对奎尼丁治疗的病人,连续心电记录,发现有发作性的,且能自行终止的室颤和室扑(这可能是“奎尼丁晕厥”的原因)。由于Q—T明显延长,发生在易颤期的早搏可导致室性心动过速。作者报告一例可能由奎尼丁所致的反复晕厥的病例。
Quinidine treatment period, the ECG can appear large QRS wave, S-T segment down, T wave low flat, P wave notch and Q-T interval prolongation. This is more often regarded as a therapeutic response than as a poisoning. Patients treated with quinidine, consecutive ECG records, found to have paroxysmal, and can terminate the ventricular fibrillation and ventricular flutter (which may be “Quinidine syncope”). Due to the marked prolongation of Q-T, premature beats in the prone phase lead to ventricular tachycardias. The authors report a case of recurrent syncope, possibly caused by quinidine.