title: Echocardiographic parameters in adolescents with sleep-related breathing disorders.
abstract: Few data are known about the effects of sleep-related breathing disorders (SRBD) on the cardiovascular system in adolescents. Forty healthy adolescents (mean age, 13.7 +/- 1.6 years) answered a questionnaire regarding symptoms of sleep-related breathing disorders (SRBD) and underwent a cardiorespiratory polygraphy and echocardiography. Echocardiographic data in snorers with polygraphic abnormalities suggestive of SRBD (positive group, n = 29) were compared with the results in nonsnorers without polygraphic abnormalities (n = 11) who were included in the control group. Ventricular dimensions and indices of left ventricular systolic function were within normal limits and were not significantly different between the two groups. Indices of left ventricular diastolic function were also within normal limits, but isovolumetric relaxation time (IVRT) was significantly longer among the positive group (72.5 +/- 8.4 msec) than among the controls (65.1 +/- 7.9 msec) (P = 0.018). Multiple regression analysis showed that posterior wall thickness was predicted by a model that included cardiac events related with respiratory events and/or desaturations, and respiratory disturbance index (RDI) in supine position. Deceleration of early diastolic flow was predicted by RDI, percentage of total recording time with SaO(2) < 90% (CT(90)), and age; the variability of isovolumetric relaxation time was predicted by a model that included RDI in supine position. We found a significant relationship between polygraphic parameters suggestive of SRBD and echocardiographic measurements of ventricular dimensions and diastolic function. Also, echocardiographic parameters suggestive of some degree of left ventricular diastolic dysfunction were found in snoring adolescents with polygraphic abnormalities.
authors.affiliation: Department of Pneumology, Hospital Universitario Virgen del Rocío, Seville, Spain. almar@comcadiz.com
authors.forename: Angeles
authors.initials: A
authors.lastname: Sánchez-Armengol
authors.forename: María J
authors.initials: MJ
authors.lastname: Rodríguez-Puras
authors.forename: María A
authors.initials: MA
authors.lastname: Fuentes-Pradera
authors.forename: Esther
authors.initials: E
authors.lastname: Quintana-Gallego
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Borja-Urbano
authors.forename: Aurelio
authors.initials: A
authors.lastname: Cayuela
authors.forename: Francisco
authors.initials: F
authors.lastname: Capote
mesh_terms: D000293:Adolescent; D017677:Age Distribution; D016022:Case-Control Studies; D002648:Child; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D015999:Multivariate Analysis; D017286:Polysomnography; D011336:Probability; D011379:Prognosis; D012016:Reference Values; D012044:Regression Analysis; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D017678:Sex Distribution; D012891:Sleep Apnea Syndromes / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D013030:Spain / Q000453:epidemiology; D011795:Surveys and Questionnaires; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000453:epidemiology