title: Associated cardiac lesions in patients with radiation-induced complete heart block.
abstract: We investigated the clinical, electrophysiological, haemodynamic and angiographic aspects of four patients (two men and two women, aged 31-46 years) who developed complete heart block 13-20 years after therapeutic irradiation of the chest for Hodgkin's disease. The initial cardiac symptom was syncope in three, effort intolerance in one. The electrocardiogram recorded third-degree atrioventricular block in three patients, right bundle branch block and posterior fascicular block in one. The electrophysiological study, performed in three cases, showed that the block was infranodal in two. Three patients had significant coronary arterial stenoses, that involved the ostia in two. All patients had mild-to-moderate aortic and mitral regurgitation. One patient had haemodynamic signs of constriction. Another patient had recurrent pericardial effusions. All had echocardiographic evidence of a thickened pericardium. Cardiac involvement can be extensive in patient with radiation-induced heart block. Because coronary artery disease can be particularly severe, coronary angiography appears to be warranted in such patients.
authors.affiliation: Istituto di Medicina e Chirurgia Cardiovascolare, University of Torino Medical School, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Orzan
authors.forename: A
authors.initials: A
authors.lastname: Brusca
authors.forename: F
authors.initials: F
authors.lastname: Gaita
authors.forename: C
authors.initials: C
authors.lastname: Giustetto
authors.forename: M C
authors.initials: MC
authors.lastname: Figliomeni
authors.forename: L
authors.initials: L
authors.lastname: Libero
mesh_terms: D000328:Adult; D001283:Atrioventricular Node / Q000503:physiopathology / Q000528:radiation effects*; D002036:Bundle of His / Q000503:physiopathology / Q000528:radiation effects; D002037:Bundle-Branch Block / Q000209:etiology / Q000503:physiopathology / Q000628:therapy; D006328:Cardiac Catheterization; D017023:Coronary Angiography; D004562:Electrocardiography / Q000528:radiation effects; D005260:Female; D006327:Heart Block / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D006333:Heart Failure / Q000209:etiology / Q000503:physiopathology / Q000628:therapy; D006439:Hemodynamics / Q000502:physiology / Q000528:radiation effects; D006689:Hodgkin Disease / Q000532:radiotherapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011832:Radiation Injuries / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D011879:Radiotherapy Dosage; D013575:Syncope / Q000209:etiology / Q000503:physiopathology / Q000628:therapy