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Heart failure patients whose implantable cardioverter defibrillators (ICDs) include an automated alert when too much fluid accumulates in their lungs did not have improved outcomes compared to patients with regular ICDs, according to results of the OPTILINK HF trial.
EMBARGO: 01 SEPTEMBER 2015 at 08:00 BST
LONDON, UK – 01 September, 2015: Heart failure patients whose implantable cardioverter defibrillators (ICDs) include an automated alert when too much fluid accumulates in their lungs did not have improved outcomes compared to patients with regular ICDs, according to results of the OPTILINK HF trial.The findings, presented at ESC Congress 2015 today, “highlight the challenges and obstacles involved in ICD-based telemonitoring for heart failure (HF),” noted the study’s principal investigator Michael Böhm MD, from Saarland University Hospital in Homburg, Germany. ““Given the considerable, and largely unmitigated burden of HF, the potential for telemonitoring to improve the management of patients with HF is substantial,” said Professor Böhm. “However, in our trial ICD-based telemonitoring did not increase appropriate interventions, despite intensive instruction of patients and physicians in the clinical trial setting,” he suggested.Because hospital admissions are frequently preceded by increased pulmonary congestion in heart failure patients, the trial used special ICDs that allow for automatic transmission of alerts to a patient’s doctor when this happens. The alert is transmitted from the ICD through a telemedicine monitor that patients have connected to the internet at home.A total of 1, 002 patients received these ICDs, with 505 patients randomly assigned to have the automated transmission turned on, and 497 patients to have it turned off (standard care). “If there was an alert, the physician called the patient, provided him with an exact care alert questionnaire, and increased therapies if necessary. Based on a strict algorithm patients were potentially seen or admitted to the hospital and care was initiated,” explained Professor Böhm. During the study period there were 1748 “fluid threshold crossings” which triggered an alert. Three quarters (76%) of these alerts were successfully transmitted from the patient’s ICD to the physician, with the remaining 24% deemed unsuccessful because the patient was either already in the hospital, on vacation without the monitor, or offline.Medical action was taken by physicians for 30% of the successful transmissions – most of these involving medication changes. In the 70% of cases where no medical action was taken, the reason was that although the alert indicated a fluid threshold crossing, it was not considered clinically actionable because the patient did not indicate visible signs or symptoms of worsening HF, explained Professor Böhm.After 18 months of follow-up there was no significant difference between groups in primary endpoint, which was a composite of all-cause death and cardiovascular hospitalisation.The primary outcome occurred in 227 patients (45•0%) in the intervention arm compared with 239 patients (48•1%) in the control arm (hazard ratio, 0•87; 95% confidence interval [CI], 0•72 to 1•04; p=0•13). There were 59 (11•7%) deaths in the intervention arm and 63 (12•7%) in the control arm group (hazard ratio, 0•89; 95% CI, 0•62 to 1.28; p=0•52). The obstacles to ICD-based HF telemonitoring identified in OptiLink HF would likely be even more pronounced in a real-life clinical setting, noted Professor Böhm. “Improved outcomes would require better patient adherence in terms of being online all the time.”ENDS
SOURCES OF FUNDING: The study was funded by Medtronic Bakken Research Center.
DISCLOSURES: Professor Böhm and his co-authors have all received grant support from Medtronic.
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About the European Society of CardiologyThe European Society of Cardiology (ESC) represents more than 90 000 cardiology professionals across Europe and worldwide. Its mission is to reduce the burden of cardiovascular disease in Europe. About ESC Congress 2015ESC Congress is the world’s largest and most influential cardiovascular event contributing to global awareness of the latest clinical trials and breakthrough discoveries. ESC Congress 2015 takes place 29 August to 2 September at ExCel London in London, UK. Access the scientific programme. More information is available from the ESC Press Office at email@example.com.To access all the scientific resources from the sessions during the congress, visit ESC Congress 365. This press release accompanies both a presentation and an ESC press conference at the ESC Congress 2015. Edited by the ESC from material supplied by the investigators themselves, this press release does not necessarily reflect the opinion of the European Society of Cardiology. The content of the press release has been approved by the presenter.
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