title: Hemodynamic effects of immunoadsorption and subsequent immunoglobulin substitution in dilated cardiomyopathy: three-month results from a randomized study.
abstract: OBJECTIVE
  The objective of our study was to assess the hemodynamic effects of immunoadsorption (IA) and subsequent immunoglobulin G (IgG) substitution in comparison with the effects of conventional medical treatment in patients with dilated cardiomyopathy (DCM).
  
  
  BACKGROUND
  Various circulating cardiac autoantibodies have been detected among patients suffering from DCM. These antibodies are extractable by IA.
  
  
  METHODS
  Patients with DCM (n = 18, New York Heart Association III-IV, left ventricular ejection fraction <30%) and who were on stable medication participated in the study. Hemodynamic measurements were performed using a Swan-Ganz thermodilution catheter. The patients were randomly assigned either to the treatment group with IA and subsequent IgG substitution (IA/IgG group, n = 9) or to the control group without IA/IgG (n = 9). In the IA/IgG group, the patients were initially treated in one IA session daily on three consecutive days. After the final IA session, 0.5 g/kg of polyclonal IgG was substituted. At one-month intervals, IA was then repeated for three further courses with one IA session daily on two consecutive days, until the third month.
  
  
  RESULTS
  After the first IA course and IgG substitution, cardiac index (CI) increased from 2.1 (+/-0.1) to 2.8 (+/-0.1) L/min/m2 (p < 0.01) and stroke volume index (SVI) increased from 27.8 (+/-2.3) to 36.2 (+/-2.5) ml/m2 (p < 0.01). Systemic vascular resistance (SVR) decreased from 1,428 (+/-74) to 997 (+/-55) dyne x s x cm(-5) (p < 0.01). The improvement in CI, SVI and SVR persisted after three months. In contrast, hemodynamics did not change throughout the three months in the control group.
  
  
  CONCLUSIONS
  Immunoadsorption and subsequent IgG substitution improves cardiovascular function in DCM.
authors.affiliation: Medizinische Klinik, Kardiologie, Humboldt-Universität zu Berlin, Germany. stephan.felix@charite.de
authors.forename: S B
authors.initials: SB
authors.lastname: Felix
authors.forename: A
authors.initials: A
authors.lastname: Staudt
authors.forename: W V
authors.initials: WV
authors.lastname: Dörffel
authors.forename: V
authors.initials: V
authors.lastname: Stangl
authors.forename: K
authors.initials: K
authors.lastname: Merkel
authors.forename: M
authors.initials: M
authors.lastname: Pohl
authors.forename: W D
authors.initials: WD
authors.lastname: Döcke
authors.forename: S
authors.initials: S
authors.lastname: Morgera
authors.forename: H H
authors.initials: HH
authors.lastname: Neumayer
authors.forename: K D
authors.initials: KD
authors.lastname: Wernecke
authors.forename: G
authors.initials: G
authors.lastname: Wallukat
authors.forename: K
authors.initials: K
authors.lastname: Stangl
authors.forename: G
authors.initials: G
authors.lastname: Baumann
mesh_terms: D000328:Adult; D001323:Autoantibodies / Q000097:blood; D002311:Cardiomyopathy, Dilated / Q000276:immunology / Q000628:therapy*; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D007074:Immunoglobulin G / Q000008:administration & dosage* / Q000097:blood; D007163:Immunosorbent Techniques; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000276:immunology; D013318:Stroke Volume / Q000502:physiology; D016277:Ventricular Function, Left / Q000502:physiology
chemical_list: D001323:Autoantibodies; D007074:Immunoglobulin G