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QRS电交替在各类器质性疾病以及健康人群中都可以发生,但其发生的机制尚未能明确,可能与心室内传导系统和心肌除极或复极化速度发生交替性改变等原因有关[1]。恶性肿瘤患者除具有原发肿瘤的临床表现之外,随着病程进展,尚可引起机体代谢紊乱,影响到循环、呼吸、消化等各个系统,一旦合并大量心包积液或心包填塞、严重心肌损害、心力衰竭、快速心律失常以及严重电解质紊乱等并发症,可以出现心电图QRS电交替。
QRS alternation can occur in all kinds of organic diseases and healthy people, but the mechanism of its occurrence is not yet clear, and may be related to the ventricular conduction system and myocardial depolarization or alternation of the speed of alternation reasons [1]. In addition to the clinical manifestations of patients with primary tumors, patients with malignant tumors can still cause metabolic disorders as the course of disease progresses, affecting various systems such as circulation, respiration and digestion. Once combined with massive pericardial effusion or tamponade, severe myocardial damage , Heart failure, tachyarrhythmia, and severe electrolyte disturbances and other complications, QRS electrocardiogram can occur alternately.