Electrical Stimulation-Guided Approach to Pulmonary Artery Catheter Ablation in Patients with Idiopathic Pulmonary Arterial Hypertension: A Pilot Feasibility Study with a 12-Month Follow-Up

Table 3

Functional capacity, echocardiography, and laboratory data before and after ablation.

	Patient 1				Patient 2			Patient 3
		Baseline	6 months	12 months	Baseline	6 months	12 months	Baseline	6 months	12 months
Functional capacity	Functional class (WHO)	II	II	I	III	III	IV	II	II	II
	6MWT, meters	510	546	575	420	300	243	521	510	470
	Peak VO2, ml/min/kg	16.9	16.2	15.6	13.8	9.9	11.4	14	13.9	9.7
Echocardiography	sRA, cm^2	19	18.3	16.3	28	28.5	29	18.3	18.9	20.8
	RV : LV ratio	0.79	0.8	0.7	1.38	1.8	1.65	0.96	0.8	0.85
	RV S′, cm/s	14	14	18	7	7	5	11	12	8
Laboratory	NT-proBNP, pg/ml	118.7	85.4	95	529	1241	1133	56.5	21	94

6MWT: six-minute test walk distance; Peak VO₂: peak oxygen uptake in cardiorespiratory testing; sRA: right atrium end systolic area; RV : LV: right ventricle to left ventricle diameter ratio; RV S′: tricuspid annular plane systolic velocity; NT-pro BNP: N-Terminal probrain natriuretic peptide.