Table 5– Post-operative outcomes at 6-months and 1-year post pulmonary endarterectomy (PEA)

	Baseline	6-months post-PEA	1-year post-PEA
New York Heart Association functional class
I	0	16*	17*
II	20	21*	12*
III	22	2*	1*
Not applicable	0	0	1
Haemodynamics
Patients	42	38^#
Mean PAP mmHg	21 (5)	18 (5)*
Cardiac index L·min⁻1·m⁻²,	2.6±0.5	2.5±0.4
PVR dyn·s·cm⁻⁵	164 (104)	128 (60)*
6-min walk test
Patients	37	34	27
Distance m	372±117	413±90*	421±113*
Baseline S_pO₂ %	97±2	97±2	97±2
Minimal S_pO2 on exercise %	91 (6)	93 (5)	93 (3)*
CAMPHOR
Patients	36	31	27
Total score	40 (33)	11 (30)*	11 (37)*
Symptoms	15 (13)	4 (12)*	5 (12)*
Activity	10 (9)	5 (6)*	4 (11)*
Quality of life	14 (14)	2 (11)*	1 (12)*

Data are presented as n, median (interquartile range) or mean±sd. PAP: pulmonary arterial pressure; PVR: pulmonary vascular resistance; S_pO₂: peripheral oxygen saturation; CAMPHOR: Cambridge pulmonary hypertension outcome review. ^#: one patient refused to have a repeat right heart catheterisation at the 6-month post-surgical review. *: p<0.05 compared to baseline.