New-onset or Pre-existing Atrial Fibrillation in Acute Coronary Syndromes: Two Distinct Phenomena With a Similar Prognosis.

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New-onset or Pre-existing Atrial Fibrillation in Acute Coronary Syndromes: Two Distinct Phenomena With a Similar Prognosis.

Rev Esp Cardiol (Engl Ed). 2018 Apr 10;:

Authors: Biasco L, Radovanovic D, Moccetti M, Rickli H, Roffi M, Eberli F, Jeger R, Moccetti T, Erne P, Pedrazzini G

Abstract
INTRODUCTION AND OBJECTIVES: The management and risk stratification of patients with atrial fibrillation (AF) and acute coronary syndromes constitute a challenge. We aimed to evaluate the prognostic impact of AF whether present at admission or occurring during hospitalization for acute coronary syndromes, as well as trends in treatments and outcome.
METHODS: Data derived from 35 958 patients enrolled between 2004 and 2015 in the AMIS Plus registry were retrospectively analyzed.
RESULTS: Pre-existing AF (pre-AF) was present in 1644 (4.7%) while new-onset AF (new-AF) was evident in 309 (0.8%). Presentation with ST-segment elevation myocardial infarction and need for hemodynamic support was frequent in patients with AF, especially in those with new onset of the arrhythmia. A change of the medical and interventional approaches was observed with a progressive increase in oral anticoagulation prescription and referral for angiography and percutaneous coronary interventions in pre-AF patients. Despite different baseline risk profile and clinical presentations, both AF groups showed high in-hospital and 1-year mortality (in-hospital new-AF vs pre-AF [OR, 0.79; 95%CI, 0.53-1.17; P = .246]; 1-year mortality new-AF vs pre-AF [OR, 0.72; 95%CI, 0.31-1.67; P = .448]) Pre-AF but not new-AF independently predicted in-hospital mortality. While mortality declined over the study period for patients with pre-AF, it remained stable among new-AF patients.
CONCLUSIONS: While pre-AF is independently associated with in-hospital mortality, new-AF may reflect a worse hemodynamic impact of the acute coronary syndromes, with the latter ultimately driving the prognosis.

PMID: 29653777 [PubMed - as supplied by publisher]

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