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Exercise-induced hypoxia predicts hypobaric hypoxia during flight in patients after Fontan operation.

Abstract：

BACKGROUND:Hypobaric hypoxia (HH) during flight might be more detrimental to pulmonary circulation in Fontan patients compared healthy individuals. This study was designed to clarify whether exercise-induced hypoxia could predict HH during flight in Fontan patients. METHODS AND RESULTS:Percutaneous oxygen saturation (SpO2) was analyzed during flight in 11 Fontan patients and eight volunteers. SpO2 was measured before taking off (S1), at the initial (S2), the end of stabilization (S3), and after landing (S4). The SpO2-dynamics were compared with SpO2-dynamics during cardiopulmonary exercise testing (CPX), pulmonary function, and hemodynamics in the Fontan patients. At all measurements, SpO2 was lower in the Fontan patients than the volunteers during flight. The total SpO2 decline from S1 to S3 was greater in the Fontan patients than the volunteers. While SpO2 change from S2 to S3 was negative in the Fontan patients, it was stable in the volunteers. In the Fontan patients, the median value of exercise-induced SpO2 decline (Ex-dSpO2), SpO2 at rest, and SpO2 at peak was -6%, 93%, and 88%, respectively. In addition to exercise capacity and pulmonary function, the Ex-dSpO2 was correlated strongly with SpO2 at all phases during flight (r = 0.75-0.98, p < 0.01 for all). Flight-associated adverse events occurred in two patients with SpO2 < 80% at S3. CONCLUSIONS:Both the Fontan patients and the volunteers demonstrated similar SpO2-dynamics during flight with a greater HH in the Fontan patients. CPX with SpO2 monitoring is useful in predicting SpO2-dynamics and adverse events during flight in these patients.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

Morimoto Y,Ohuchi H,Kurosaki K,Nakai M

doi

10.1016/j.ijcard.2020.09.069

subject

Has Abstract

pub_date

2020-10-01 00:00:00

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(20)33899-7

pub_type

杂志文章

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