Abstract:
BACKGROUND:Balloon pulmonary angioplasty (BPA) in chronic thromboembolic pulmonary hypertension (CTEPH) improves hemodynamics and exercise capacity. However, its effect on respiratory function is unclear. Our objective was to investigate the effect of BPA on respiratory function. METHODS:We enrolled patients with inoperable CTEPH who underwent BPA primarily in lower lobe arteries (first series) and upper and middle lobe arteries (second series). We compared changes in hemodynamics and respiratory function between different BPA fields. RESULTS:Sixty-two BPA sessions were performed in 13 consecutive patients. Mean pulmonary arterial pressure and pulmonary vascular resistance significantly improved from 44 ± 8 to 23 ± 5 mm Hg and 818 ± 383 to 311 ± 117 dyne/s/cm-5. The percent predicted diffusion capacity of lung for carbon monoxide (Dlco) decreased after BPA in the lower lung field (from 60% ± 8% to 54% ± 8%) with no recovery. Percent Dlco increased after BPA in the upper middle lung field (from 53% ± 6% to 58% ± 6%) and continued to improve during the follow-up (from 58% ± 6% to 64% ± 11%). The ventilation/Co2 production (V˙e/V˙co2) slope significantly improved after BPA in the lower lung field (from 51 ± 13 to 41 ± 8) and continued to improve during the follow-up (from 41 ± 8 to 35 ± 7); however, the V˙e/V˙co2 slope remained unchanged after BPA in the upper/middle lung field. Changes in % Dlco and the V˙e/V˙co2 slope differed significantly between lower and upper/middle lung fields. CONCLUSIONS:The effect of BPA on respiratory function in patients with CTEPH differed depending on the lung field.
journal_name
Chestjournal_title
Chestauthors
Akizuki M,Serizawa N,Ueno A,Adachi T,Hagiwara Ndoi
10.1016/j.chest.2016.10.002subject
Has Abstractpub_date
2017-03-01 00:00:00pages
643-649issue
3eissn
0012-3692issn
1931-3543pii
S0012-3692(16)60761-4journal_volume
151pub_type
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