Specialized Atrial Fibrillation Clinic reduces cardiovascular morbidity and mortality in patients with atrial fibrillation Jeroen ML Hendriks, MSc Robert G Tieleman, PhD, MD Robert G Tieleman, PhD, MD Department of Cardiology Cardiovascular Research Institute Maastricht University Medical Centre, The Netherlands Martini Hospital Groningen, The Netherlands
Euro Heart Survey Antithrombotics according to CHADS2 score Poor adherence to guidelines on management of AF Non-adherence to guidelines increased morbidity / mortality Nieuwlaat et al. EHJ 2005, 2006
Multivariate analysis antithrombotic guideline deviance Nieuwlaat et al. Am Heart J 2007
The AF-Clinic An integrated chronic care program for patients with atrial fibrillation Substitution of care by specialized nurses Management of AF according to guidelines Dedicated knowledge software Supervision by cardiologists
Nurse-led, guideline based, software-supported AF-Clinic, supervised by cardiologists improves clinical outcome in patients with atrial fibrillation in comparison to usual care Hypothesis
Methods PROBE: Prospective, Randomized, Open label, Blinded Endpoint trial, comparing the AF-Clinic to usual care Randomization of 712 pts with newly diagnosed AF into Nurse-led Care group or Usual Care group Inclusion criteria Age ≥ 18 years AF documented on ECG Exclusion criteria Unsatisfactorily treated co-morbidity (hypertension, heart failure, …) Follow-up at least 1 year
Primary endpoint (composite) Cardiovascular mortality Cardiovascular hospitalization for Heart failure Stroke Acute myocardial infarction Systemic embolism Bleeding Arrhythmic events Atrial Fibrillation Syncope Sustained ventricular tachycardia Cardiac arrest Life-threatening effects of drugs
Baseline characteristics CharacteristicsNurse-led Care (N = 356)Usual Care (N = 356) Age - yr66 ± 1367 ± 12 Male sex - no (%)197 (55.3)221 (62.1) Type of AF - no (%) Paroxysmal190 (53.4)203 (57.0) Persistent 68 (19.1) 44 (12.4) Permanent 75 (21.1) 84 (23.6) Symptomatic AF - no (%)294 (82.6)296 (83.1) History of underlying disease Hypertension187 (52.5)193 (54.2) Diabetes mellitus 50 (14.0) 46 (12.9) Previous stroke / TIA 44 (12.4) 45 (12.6) Coronary artery disease 33 (9.3) 38 (10.7) Myocardial infarction 19 (5.3)22 (6.2) Congestive heart failure 25 (7.0) Peripheral vascular disease 13 (3.7)20 (5.6) Hyperthyroidism 12 (3.4) Mitral or aortic valve disease 12 (3.4)21 (5.9) No underlying heart disease 6 (1.7) 7 (2.0)
Baseline characteristics CharacteristicsNurse-led Care (N = 356)Usual Care (N = 356) CHADS2 score - no (%) 0107 (30.0) 95 (26.7) 1122 (34.3)135 (37.9) >1127 (35.7)126 (35.4) Threatment - no (%) Beta-blocker164 (46.1)187 (52.5) Digitalis 59 (16.6) 43 (12.1) Verapamil 44 (12.4) 18 (5.1) Vaughan-Williams class I & III105 (29.1) 88 (24.7) Vitamin K antagonist218 (61.2)188 (52.8) Aspirin118 (33.1)108 (30.3) Echocardiographic findings Size of left atrium, long axis - mm42 ± 643 ± 8 LV end-diastolic size - mm49 ± 6 LV end-systolic size - mm34 ± 6 LV ejection fraction - %57 ± 1056 ± 12
Results After a mean follow-up of 22 months Composite end point - 51 patients (14.3%) Nurse-led Care - 74 patients (20.8%) Usual Care (HR 0.65, 95% CI )
Results: composite endpoint
Results Cardiovascular hospitalization - 48 patients (13.5%) Nurse-led Care - 68 patients (19.1%) Usual Care (HR 0.66, 95% CI )
Causes of cardiovascular hospitalization
Results Cardiovascular death - 4 patients (1.1%) Nurse-led Care - 14 patients (3.9%) Usual Care (HR 0.28, 95% CI )
Causes of cardiovascular death
Results: guideline adherence Echocardiogram performed Laboratory assessment of Thyroid Stimulating Hormone Application of appropriate anti- thrombotic treatment Appropriate prescription of Vaughan-Williams class I or III Avoiding rhythm control strategy in asymptomatic patients Avoiding rhythm control drugs in patients with permanent AF
Results: guideline adherence Echocardiogram performed Laboratory assessment of Thyroid Stimulating Hormone Application of appropriate anti- thrombotic treatment Appropriate prescription of Vaughan-Williams class I or III Avoiding rhythm control strategy in asymptomatic patients Avoiding rhythm control drugs in patients with permanent AF
Conclusion Management of atrial fibrillation patients in a specialized AF-Clinic improves outcome compared to usual care.
Members of the study group Writing Committee HJGM Crijns JML Hendriks RG Tieleman HJM Vrijhoef R de Wit MH Prins R Pisters LAFG Pison Y Blaauw Steering Committee HJGM Crijns RG Tieleman R de Wit HJM Vrijhoef Adjudication Committee C Franke H ten Cate GVA van Ommen RJMW Rennenberg
Back-up slides
Discussion Difficult to pinpoint nurses or guidelines or dedicated software as the sole reason for results Improved guideline adherence and outcomes due to an integrated approach: a combination of ingredients
Results: multivariate analyses