Article (Scientific journals)
Subclinical impairment of dynamic left ventricular systolic and diastolic function in patients with obstructive sleep apnea and preserved left ventricular ejection fraction.
D'Andrea, Antonello; Canora, Angelo; Sperlongano, Simona et al.
2020In BMC Pulmonary Medicine, 20 (1), p. 76
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Keywords :
2D speckle tracking echocardiography; Diastolic function; Exercise echocardiography; Obstructive sleep apnea; Oxidative burst
Abstract :
[en] BACKGROUND: Hypoxia affects myocardial oxygen supply resulting in subclinical cardiac dysfunction in obstructive sleep apnea (OSA) patients, with cardiovascular complications being associated with increased oxidative burst (OB). The aims of our study were to assess left ventricular (LV) dynamic myocardial deformation and diastolic reserve at rest and upon exercise, along with OB determination in this patients subset. METHODS: Conventional echocardiography, Doppler myocardial imaging and LV 2D speckle tracking echocardiography were performed in 55 OSA patients with preserved LV ejection fraction (EF) and 35 age and sex-comparable healthy controls. Peripheral OB levels were evaluated by flow cytometry. RESULTS: Despite comparable LVEF, LV global longitudinal strain (GLS) was significantly reduced in OSA at rest (- 13.4 ± 3.8 vs - 18.4 ± 3.3 in controls, P <  0.001) and at peak exercise (- 15.8 ± 2.6 vs - 23.4 ± 4.3, P <  0.001). Systolic pulmonary artery pressure (sPAP) and E/E' ratios increase during effort were higher in OSA than in controls (ΔsPAP 44.3% ± 6.4 vs 32.3% ± 5.5, P <  0.0001, and ΔE/E' 87.5% ± 3.5 vs 25.4% ± 3.3, P <  0.0001, respectively). The best correlate of E/E' at peak stress was peak exertion capacity (r = - 0.50, P <  0.001). OB was also increased in OSA patients (P = 0.001) but, unlike OSA severity, was not associated with LV diastolic dysfunction. CONCLUSIONS: Evaluation of diastolic function and myocardial deformation during exercise is feasible through stress echocardiography. OSA patients with preserved LVEF show subclinical LV systolic dysfunction, impaired LV systolic and diastolic reserve, reduced exercise tolerance, and increased peripheral levels of OB. Therapy aimed at increasing LV diastolic function reserve might improve the quality of life and exercise tolerability in OSA patients.
Disciplines :
Cardiovascular & respiratory systems
Author, co-author :
D'Andrea, Antonello
Canora, Angelo
Sperlongano, Simona
Galati, Domenico
Zanotta, Serena
Polistina, Giorgio Emanuele
Nicoletta, Carmine
Ghinassi, Giacomo
Galderisi, Maurizio
Zamparelli, Alessandro Sanduzzi
Lancellotti, Patrizio  ;  Université de Liège - ULiège > Département des sciences cliniques > Cardiologie - Pathologie spéciale et réhabilitation
Bocchino, Marialuisa
Language :
English
Title :
Subclinical impairment of dynamic left ventricular systolic and diastolic function in patients with obstructive sleep apnea and preserved left ventricular ejection fraction.
Publication date :
2020
Journal title :
BMC Pulmonary Medicine
eISSN :
1471-2466
Publisher :
BioMed Central, United Kingdom
Volume :
20
Issue :
1
Pages :
76
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 June 2020

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