The frequencies of abnormal ECG increased along with ages, except sinus arrhythmias and preexcitationsyndrome.
异常心电图除窦性心律失常、预激综合征外,异常率随年龄增高而递增;
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Methods: 30 cases of familial preexcitationsyndrome and 363 cases of sporadic patients were compared in clinical and electrophysiologic characteristics.