Table 3.

Long-Term Clinical and Echocardiographic Outcomes

	Myectomy	Alcohol Ablation	P Value*
Duration of follow-up, y	4.0±2.8	4.1±3.1	0.59
NYHA class, n (%)
I	192 (61.5)	29 (33.3)
II	107 (34.3)	49 (56.3)
III/IV	13 (4.2)	9 (10.3)	<0.001
LVOT gradient ≥30 mm Hg, n (%)	8 (2.1)	26 (26.3)	<0.001
LVEF, %	58±7	64±5	<0.001
Resting moderate mitral regurgitation	24 (6)	21 (21)	<0.001
Major interventions
Repeat invasive septal therapy, n (%)	0 (0)	7 (7.1)	<0.001
Mitral valve intervention, n (%)	2 (0.5)	0 (0)	1.0
Heart transplantation, n (%)	0 (0)	1 (1.0)	1.0
Resuscitated cardiac arrest, n (%)	1 (0.3)	0 (0)	1.0
Appropriate ICD interventions, n (%)	8(2.1)	0 (0)	0.21
Mortality, n (%)	11 (2.9)	2 (2.0)	0.63

Values are mean±SD or n (%). ICD indicates implantable cardioverter defibrillator; LVEF, left ventricular ejection fraction; LVOT, left ventricular outflow tract; and NYHA, New York Heart Association.

^*P value is for comparison of myectomy vs alcohol ablation.