这个词是什么意思？
A type of cardiac arrhythmia with premature contractions of the HEART VENTRICLES. It is characterized by the premature QRS complex on ECG that is of abnormal shape and great duration (generally >129 msec). It is the most common form of all cardiac arrhythmias. Premature ventricular complexes have no clinical significance except in concurrence with heart diseases.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D018879 · MeSH 2026。
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