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Yıl:2017; Cilt: 4; Sayı: 3>> Özet
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Türk Uyku Tıbbı Dergisi; 2017;4(3):65-70
Obezite Hipoventilasyon Sendromunda Ekokardiyografik Bulgular
A Pıhtılı, E Karaayvaz, Z Bingöl, AK Bilge, G Okumuş, E Kıyan
İstanbul Üniversitesi, İstanbul
Amaç: Obezite Hipoventilasyon sendromunda (OHS), saf Obstrüktif Uyku Apne sendromuna (OUAS) göre pulmoner hipertansiyon (PH) önemli bir morbidite ve mortalite nedenidir. Ancak bu konuda literatürde az sayıda çalışma mevcuttur. Bu nedenle çalışmamızda OHS ve saf OUAS olgularını, sağ kalp ile ilişkili ekokardiyografik parametreler ve PH açısından değerlendirdik. Gereç ve Yöntem: Polisomnografi ile tanı konulan obez [vücut kitle indeksi (VKİ) >30 kg/m2] OUAS olguları çalışmaya dahil edildi. Olgular OHS ve saf OUAS olarak iki gruba ayrıldı. OHS tanı kriterleri obezite (VKİ >30 kg/m2) ve başka bir nedenle açıklanamayan (nöromüsküler hastalık, göğüs duvarı patolojileri, restriktif ve obstrüktif akciğer hastalıkları gibi) gündüz hiperkapnisi (PaCO2 >45 mmHg) olarak tanımlanmıştır. Ciddi hipotiroidi, böbrek ve kalp yetmezliği, kardiyak ilaç anamnezi olanlar çalışmaya dahil edilmedi. Olgulara transtorasik ekokardiyografi yapıldı ve sol kalp patolojisi olanlar çalışma dışı bırakıldı. Sistolik pulmoner arter basıncı (PABs) >35 mmHg olması, PH olarak kabul edildi. Bulgular: Çalışmaya alınan 115 olgunun (ortalama yaş: 49,3±10,6/ yıl, kadın/erkek: 53/62, VKİ: 40,5±6,1 kg/m2) 70’i saf OUAS, 45’i OHS idi. OHS grubunda PABs, sağ ventrikül çapı ve pulmoner velosite saf OUAS grubuna göre anlamlı olarak daha yüksekti (p=0,002, p=0,015, p=0,012). OHS grubunda, PH sıklığı saf OUAS grubuna göre anlamlı olarak daha fazlaydı (%48,8 ve %17,1, p<0,001). Genel grupta, PABs değeri ile apne-hipopne indeksi, OUAS ağırlığı, oksijen desaturasyon indeksi, SpO2 <%90 geçen süre ve OHS varlığı arasında pozitif korelasyon vardı (sırasıyla; r=0,307, p=0,001; r=0,259, p=0,005; r=0,405, p<0,001; r=0,162, p<0,001; r=0,305 p=0,001). PABs ile ortalama ve minimum SpO2 arasında negatif korelasyon vardı (sırasıyla r=-0,404, p<0,001; r=- 0,344, p<0,001). Sonuç: OHS olgularında; PABs, sağ ventrikül çapı ve pulmoner velosite ve PH sıklığı saf OUAS’a göre daha yüksektir. OHS olgularına rutin olarak ekokardiyografik değerlendirme de yapılmalıdır.
Echocardiographic Findings in Obesity Hypoventilation Syndrome
Objective: In Obesity Hypoventilation syndrome (OHS), pulmonary hypertension (PH) is an important morbidity and mortality reason compared to pure Obstructive Sleep Apnea syndrome (OSAS). However, few studies are available in the literature about this subject. For this reason, we evaluated OHS and pure OSAS cases in our study from the point of right heart-related echocardiographic parameters and PH. Materials and Methods: Obese [body mass index (BMI) >30 kg/m2] cases diagnosed by polysomnography were included in the study. The subjects were divided to two groups as OHS and pure OSAS. OHS criteria were defined as obesity (BMI >30 kg/m2) and for another reason unexplained (neuromuscular, chest wall, restrictive or obstructive pulmonary diseases) daytime hypercapnia (PaCO2 >45 mmHg). Patients with severe hypothyroidism, renal and heart insufficiency, cardiac drug anamnesis were not included in the study. Transthoracic echocardiography was performed to all cases and those with left-heart pathology were excluded from the study. Systolic pulmonary artery pressure (PABs) >35 mmHg was accepted as PH. Results: Of the 115 cases studied (mean age: 49.3±10.6/year, female/ male: 53/62, BMI: 40.5±6.1 kg/m2), 70 were pure OSAS and 45 were OHS. In the OHS group, PABs, right ventricular diameter and pulmonary velocities were significantly higher than the pure OSAS group (p=0.002, p=0.015, p=0.012, respectively). The frequency of PH in OHS was significantly higher than group with pure OSAS (48.8% vs. 17.1%, p<0.001). In the overall group, there was a positive correlation between PABs value and apnea-hypopnea index, OSAS phase, oxygen desaturation index, SpO2 <90% elapsed time, and OHS presence (r=0.307, p=0.001; r=0.259, p=0.005; r=0.405, p<0.001; r=0.162, p<0.001; r=0.305, p=0.001, respectively). There was negative correlation between PABs and mean and minimum SpO2 (r=-0.404, p<0.001; r=-0.344, p<0.001, respectively). Conclusion: In OHS cases; PAPs, right ventricular diameter and pulmonary velocities, and PH frequency are higher than pure OSAS. Echocardiographic evaluation should be routinely performed for OHS cases

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