all patients with a left ventricular ejection fraction superior or equal to 50% less than 2 years after an acute coronary event and receiving ticagrelor will undergo a sleep polygraphy the main objective of the study will be to look for central sleep apnea
all patients with a left ventricular ejection fraction superior or equal to 50% less than 2 years after an acute coronary event and receiving ticagrelor will undergo a sleep polygraphy