VT was a kind of serious arrhythmia, but SVT usually had favourable prognosis.

室性心动过速是一种严重的心律失常, 而室上性心动过速一般预后良好.

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Chelation therapy was the main vigorous way to cure the disease with rather favourable prognosis.

治疗主要措施是积极驱铅治疗,预后良好.

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