结果：头胸导联所记录到的Q波数及Q波幅度均显著低于常规导联心电图。

Results: Q wave amplitude and Q wave numbers recorded in Head-Chest leads were lower than those recorded by Routine lead ECG.

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目的观察在窄qrs波心动过速鉴别诊断时，头胸导联心电图是否优于常规12导联心电图。

Objective To observe whether the head-chest leads electrocardiogram (HCECG) is better than the routine 12-leads electrocardiogram (RLECG) in different diagnosis of narrow QRS complex tachycardias.

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头容正，肩容平，胸容宽，背容直。

Keep your head upright, shoulders horizontal, chest broad, back straight.

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