RATIONALE: Abdominal aortic aneurysms (AAA) are associated with life-threatening complications. The likelihood that an AAA will rupture is influenced by the aneurysm diameter and its expansion rate; reasons for rapid expansion are largely unknown. OBJECTIVES: To determine the prevalence of obstructive sleep apnea (OSA) in patients with AAA, and investigate a possible association between OSA and rate of AAA expansion. METHODS: A total of 127 patients (11 females), included in an AAA surveillance program, agreed to participate and underwent a sleep study. Annual AAA expansion was determined retrospectively from available ultrasound measurements. OSA was characterized using both oxygen desaturation index (ODI) and apnea-hypopnea index (AHI). Univariate and multivariate analysis was performed to assess the effect of OSA severity on AAA expansion. MEASUREMENTS AND MAIN RESULTS: Mean age was 67.9 (SD, 6) years. Median interval between the first and last AAA measurements was 18 (range, 2-113) months. An ODI or AHI of greater than 10 was found in 40.5% and 41.5% of the patients, respectively. Patients with an ODI greater than 30 (n = 12) had a significantly faster median yearly AAA expansion rate (2.9; quartiles 2/5.7 mm/y) than patients with an ODI 0-5 (n = 47; 1.2; quartiles 0/3.1 mm/y) or 6-15 (n = 43; 1.3; quartiles 0/2.7 mm/y) (P < 0.05). In multivariate regression analysis, controlling for cardiovascular risk factors and medications, ODI greater than 30 remained an independent risk factor for AAA expansion. CONCLUSIONS: In patients with AAA, OSA is highly prevalent. Severe OSA may be a causal factor for faster AAA expansion, but this needs to be proved in a randomized controlled intervention trial.
RATIONALE: Abdominal aortic aneurysms (AAA) are associated with life-threatening complications. The likelihood that an AAA will rupture is influenced by the aneurysm diameter and its expansion rate; reasons for rapid expansion are largely unknown. OBJECTIVES: To determine the prevalence of obstructive sleep apnea (OSA) in patients with AAA, and investigate a possible association between OSA and rate of AAA expansion. METHODS: A total of 127 patients (11 females), included in an AAA surveillance program, agreed to participate and underwent a sleep study. Annual AAA expansion was determined retrospectively from available ultrasound measurements. OSA was characterized using both oxygen desaturation index (ODI) and apnea-hypopnea index (AHI). Univariate and multivariate analysis was performed to assess the effect of OSA severity on AAA expansion. MEASUREMENTS AND MAIN RESULTS: Mean age was 67.9 (SD, 6) years. Median interval between the first and last AAA measurements was 18 (range, 2-113) months. An ODI or AHI of greater than 10 was found in 40.5% and 41.5% of the patients, respectively. Patients with an ODI greater than 30 (n = 12) had a significantly faster median yearly AAA expansion rate (2.9; quartiles 2/5.7 mm/y) than patients with an ODI 0-5 (n = 47; 1.2; quartiles 0/3.1 mm/y) or 6-15 (n = 43; 1.3; quartiles 0/2.7 mm/y) (P < 0.05). In multivariate regression analysis, controlling for cardiovascular risk factors and medications, ODI greater than 30 remained an independent risk factor for AAA expansion. CONCLUSIONS: In patients with AAA, OSA is highly prevalent. Severe OSA may be a causal factor for faster AAA expansion, but this needs to be proved in a randomized controlled intervention trial.
Authors: Christian F Clarenbach; Giovanni Camen; Noriane A Sievi; Christophe Wyss; John R Stradling; Malcolm Kohler Journal: J Appl Physiol (1985) Date: 2013-06-13
Authors: Vittorio E Bianchi; William G Herbert; Jonathan Myers; Paul M Ribisl; Larry E Miller; Ronald L Dalman Journal: Sleep Breath Date: 2014-09-10 Impact factor: 2.816
Authors: Oleg Y Chernyshev; Shyamal C Bir; Tanmoy K Maiti; Devi Prasad Patra; Hai Sun; Bharat Guthikonda; Roger E Kelley; Hugo Cuellar; Alireza Minagar; Anil Nanda Journal: J Clin Sleep Med Date: 2019-12-15 Impact factor: 4.062