Table 5.

Evaluation of severity of CMS before and after TEA treatment.

	Before TEA	After TEA	P value
6 min walking test (m)	550.4±79.0	578.5±83.1	<0.001
NYHA(n)			<0.05
I	18	27
II	13	5
III	1	0
IV	0	0
Borg dyspnea scale	0.88±0.81	0.48±0.73	<0.001
Qinghai CMS score	7.58±2.31	0.45±0.85	<0.001