Rotman M, Triebwasser J H
Circulation. 1975 Mar;51(3):477-84. doi: 10.1161/01.cir.51.3.477.
The experience with bundle branch block at the USAF School of Aerospace Medicine was reviewed. The clinical and follow-up status was evaluated in 394 subjects with right bundle branch block (RBBB) and 125 subjects with left bundle branch block (LBBB). The majority of subjects were asymptomatic at the time of bundle branch block diagnosis. The subjects were divided into subfroups based on electrocardiographic (EEG) findings to determine if any one subfroup was at higher risk for initial or follow-up morbidity of cardiobascular disease or follow-up mortality. At initial diagnosis and clinical evaluation, 94% of RBBB and 89% of LBBB subjects had no evidence of cardiobascular disease. In the RBBB group, 3 and 2% had cornary heart disease and hypertension, respectively; in LBBB subjects, 9 and 7% had cornary heart disease and hypertension, respectively. No one ECG subfroup in either the RBBB or LBBB group had a higher incidence of cardiobascular disease. Complete follow-up information was available in 94% of the RBBB subgroup subjects and 91% of the LBBB group. In the follow-up period, new cases of coronary heart disease and hypertension occurred in 6% of the RBBB group and 5 and 8%, respectively, in the LBBB group. Fourteen (4%) RBBB and nine (8%) LBBB subjects died during the follow-up period. No differences for follow-up groups. Progressive electrical dysfunction in the form of complete heart block occurred in one subject each absence, and degree of associated cardiobascular disease. Furthermore, within the age limits of the present aeromedical implications of bundle block are discussed.
回顾了美国空军航空航天医学院关于束支传导阻滞的经验。对394例右束支传导阻滞（RBBB）患者和125例左束支传导阻滞（LBBB）患者的临床及随访情况进行了评估。大多数患者在束支传导阻滞诊断时无症状。根据心电图（EEG）结果将患者分为亚组，以确定是否有任何一个亚组患心血管疾病初始或随访发病或随访死亡的风险更高。在初始诊断和临床评估时，94%的RBBB患者和89%的LBBB患者没有心血管疾病的证据。在RBBB组中，分别有3%和2%的患者患有冠心病和高血压；在LBBB患者中，分别有9%和7%的患者患有冠心病和高血压。RBBB组或LBBB组中没有一个心电图亚组的心血管疾病发病率更高。94%的RBBB亚组患者和91%的LBBB组患者有完整的随访信息。在随访期间，RBBB组中有6%的患者出现了冠心病和高血压新病例，LBBB组中分别为5%和8%。14例（4%）RBBB患者和9例（8%）LBBB患者在随访期间死亡。随访组之间无差异。完全性心脏传导阻滞形式的进行性电功能障碍在每组各有1例患者中出现，以及相关心血管疾病的程度。此外，还讨论了在当前航空医学适用年龄范围内束支传导阻滞的意义。
