title: [Clinical types of trifascicular block and a follow-up study of pacemaker application].
abstract: Thirty five patients (pts) with trifascicular block (TFB) were followed up for 5 years, and indication of pacemaker and clinical types of TFB were discussed. All of the 35 pts were diagnosed with clinical, ECG monitoring and His bundle electrogram (HBE) and classified into 4 groups: (1) acute transient TFB (3 cases) characterized by RBBB + LAHB + I or II AVB, caused by acute myocarditis or AMI, recovered with medicinal treatment; (2) 4 cases of acute advanced TFB characterized by RBBB + LAHB or LAPB + III AVB with severe symptoms such as syncope and Adams-Stokes syndrome; (3) 12 cases of chronic TFB characterized by RBBB + LAHB or LPHB + I, II or III AVB, with 40 beats/min lower heart rate and severe symptoms; (4) 18 cases of chronic advanced TFB characterized by RBBB + LAHB or LPHB + 1, 11 or III AVB, with severe symptoms. The 32 pts in groups 2, 3, and 4 were treated with implanted pacemakers and recovered very well. 29 pts are still well with pacemakers, and 5 cases with cardiomyopathy died due to chronic heart failure during the follow-up period of 5 years.
  
  
  CONCLUSIONS
  all of the pts with TFB and severe symptoms treated with pacemakers were appropriate, and are living well except those with chronic heart failure.
authors.affiliation: First Teaching Hospital, Xian Medical University.
authors.forename: C
authors.initials: C
authors.lastname: Cui
mesh_terms: D002037:Bundle-Branch Block / Q000145:classification* / Q000601:surgery; D004562:Electrocardiography; D005500:Follow-Up Studies; D006801:Humans; D010138:Pacemaker, Artificial; D011379:Prognosis