Effect of Institutional Experience on Outcomes of Alcohol Septal Ablation for Hypertrophic Obstructive Cardiomyopathy

Josef Veselka, Lothar Faber, Morten Kvistholm Jensen, Robert Cooper, Jaroslav Januska, Jan Krejci, Thomas Bartel, Maciej Dabrowski, Peter Riis Hansen, Vibeke Marie Almaas, Hubert Seggewiss, Dieter Horstkotte, Radka Adlova, Henning Bundgaard, Jurriën Ten Berg, Max Liebregts

21 Citations (Scopus)

Abstract

Background The current American College of Cardiology Foundation/American Heart Association guidelines on hypertrophic cardiomyopathy state that institutional experience is a key determinant of successful outcomes and lower complication rates of alcohol septal ablation (ASA). The aim of this study was to evaluate the safety and efficacy of ASA according to institutional experience with the procedure. Methods We retrospectively evaluated 1310 patients with symptomatic obstructive hypertrophic cardiomyopathy who underwent ASA and were divided into 2 groups. The first-50 group consisted of the first consecutive 50 patients treated at each centre, and the over-50 group consisted of patients treated thereafter (patients 51 and above). Results In the 30-day follow-up, there was a significant difference in the occurrence of major cardiovascular adverse events (21% in the first-50 group vs 12% in the over-50 group; P < 0.01), which was driven by the occurrence of cardiovascular deaths (2.1% vs 0.4%; P = 0.01) and implanted pacemakers (15% vs 9%; P < 0.01). In the long-term follow-up (5.5 ± 4.1 years), the first-50 group was associated with a significantly higher occurrence of major adverse events (P < 0.01) and higher cardiovascular mortality (P < 0.01). Also, patients in the first-50 group were more likely to self-report dyspnea of New York Heart Association class III/IV (16% vs 10%), to have a left ventricular outflow gradient > 30 mm Hg (16% vs 10%) at the last clinical check-up (P < 0.01 for both), and a probability of repeated septal reduction therapy (P = 0.03). Conclusions An institutional experience of > 50 ASA procedures was associated with a lower occurrence of ASA complications, better cardiovascular survival, better hemodynamic and clinical effect, and less need for repeated septal reduction therapy.

Original languageEnglish
JournalCanadian Journal of Cardiology
Volume34
Issue number1
Pages (from-to)16-22
Number of pages7
ISSN0828-282X
DOIs
Publication statusPublished - Jan 2018

Keywords

  • Ablation Techniques/adverse effects
  • Age Factors
  • Cardiac Output, Low
  • Cardiomyopathy, Hypertrophic/mortality
  • Cardiovascular Diseases/mortality
  • Dyspnea/etiology
  • Electric Countershock/statistics & numerical data
  • Ethanol/administration & dosage
  • Europe/epidemiology
  • Female
  • Heart Rate
  • Heart Septum/surgery
  • Humans
  • Male
  • Middle Aged
  • Pacemaker, Artificial/statistics & numerical data
  • Registries
  • Retreatment
  • Retrospective Studies
  • Stroke Volume

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