title: Biventricular pacing demonstrates similar effects in elderly and younger patients with advanced heart failure in the mid-term follow-up.
abstract: BACKGROUND
  Biventricular (BIV) pacing has been shown to improve haemodynamics and functional status of patients (pts) with advanced chronic heart failure (CHF). No study has determined the effects of BIV in relation to the age of pts.
  
  
  OBJECTIVE
  To compare the clinical outcome in two groups of pts: > or =65 years (yrs) and <65 yrs referred for BIV pacing in our centre with at least 6 months of follow-up.
  
  
  METHODS
  Among 15 pts > or =65 yrs and 16 pts <65 yrs successfully implanted with a BIV pacemaker, 12 and 15 pts, respectively, completed 6-month follow-up. Evaluation included change of NYHA class, 6-minute walking distance (6-minWD), drug therapy, QRS duration and echocardiographic parameters. The need for hospitalisation due to the worsening of CHF symptoms, assessed 6 months before and 6 months after BIV pacing, was compared. During long-term follow-up survival and complications related to this therapy were analysed.
  
  
  RESULTS
  In both groups after 6 months of BIV pacing clinical improvement was observed, as demonstrated by the reduction in NYHA class (p <0.005), average duration of hospitalisation due to CHF (p <0.05) and diuretics doses (p <0.05). The comparison of changes in these parameters between the two groups, as well as of changes in 6-minWD and echocardiographic parameters, did not show significant difference. BIV pacing enabled an increase in the dosage of beta-blockers (in 50% pts > or =65 yrs and 60% pts <65 yrs), as well as of ACEI or ARB (25% and 40% pts, respectively). Survival was 80% in 15 pts > or =65 yrs during 16+/-15 months of follow-up and 81% in 16 pts v65 yrs during 22+/-14 months. All complications occurred in the 30-day post-operative period with similar frequency in both groups, also when LV lead-related complications were compared.
  
  
  CONCLUSIONS
  In the mid-term follow-up BIV pacing demonstrates similar improvement in clinical status and exercise tolerance in elderly pts > or =65 yrs, as compared with pts <65 yrs. In both groups BIV pacing reduced the need for hospitalisation due to worsening of CHF symptoms, and enabled beneficial changes in the pharmacological treatment. Elderly patients are not at risk of more frequent complications associated with BIV pacing.
authors.affiliation: II Klinika Chorób Serca, Instytut Kardiologii AM, ul. Debinki 7, 80-211 Gdańsk. elew@amg.gda.pl
authors.forename: Ewa
authors.initials: E
authors.lastname: Lewicka-Nowak
authors.forename: Alicja
authors.initials: A
authors.lastname: Dabrowska-Kugacka
authors.forename: Anna
authors.initials: A
authors.lastname: Faran
authors.forename: Andrzej
authors.initials: A
authors.lastname: Kutarski
authors.forename: Rajmund
authors.initials: R
authors.lastname: Wilczek
authors.forename: Grazyna
authors.initials: G
authors.lastname: Swiatecka
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Raczak
mesh_terms: D000328:Adult; D000368:Aged; D002304:Cardiac Pacing, Artificial / Q000379:methods*; D017147:Defibrillators, Implantable; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000503:physiopathology / Q000628:therapy*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D016896:Treatment Outcome