Year : 2017  |  Volume : 11  |  Issue : 2  |  Page : 154-160

Sleep-disordered breathing in ischemic cardiomyopathy and hypertensive heart failure patients

1 Department of Chest Diseases and Tuberculosis, Faculty of Medicine, Assiut University, Assiut, Egypt
2 Department of Cardiology, Faculty of Medicine, Assiut University, Assiut, Egypt
3 Department of Clinical Pathology, Faculty of Medicine, Assiut University, Assiut, Egypt

Correspondence Address:
Doaa Magdy
Chest Diseases and Sleep Medicine, Chest Department, Faculty of Medicine, Assiut University Hospital, Assiut, 71111
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ejb.ejb_42_16

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Aims The aims of this study are to (a) detect the effect of different types of heart diseases [ischemic, cardiomyopathy, hypertensive heart failure (HF)] on the association with sleep disorders, and to (b) identify the relationship between Cheyne–Stokes respiration (CSR) and left ventricular dysfunction. Materials and methods In a cross-sectional study involving 100 HF patients, we performed echocardiography and a full-night attended polysomnography for all patients. Results In all, 47.9% of patients with ischemic heart disease had obstructive sleep apnea (OSA), whereas 37.5% had central sleep apnea (CSA). OSA was highly prevalent in patients with hypertensive heart disease (79.2%). On the other hand, 50.0% patients with dilated cardiomyopathy (DCM) had CSA, whereas 39.3% had OSA. Patients with DCM had a significant increase in the central apnea index (11.05±9.19 events/h), as well cycle length of CSR (68.14±13.26 s), as compared with other groups. There was an inverse increase of cycle length with reduction in left ventricular ejection fraction (LVEF) (LVEF≥50% had a cycle length of 41.55±10.84 s, whereas those with LVEF≤30% had a longer mean cycle length of 69.23±18.09 s). Conclusion Sleep-disordered breathing is a common disorder in different groups of HF. OSA was prevalent in ischemic and hypertensive heart disease, whereas CSA was prevalent in DCM. There was a significant increase in cycle length of CSR with a reduction in LVEF.

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