Table 2. NYHA class in patients before, six months and two years after CABG.

		NYHA class
		I	II	III	IV
Before CABG	Number of patients	16	98	66	3
	Percentage (%)	9	53	36	2
Six months after CABG	Number of patients	78	94	11	0
	Percentage (%)	43	51	6	0
Two years after CABG	Number of patients	89	79	13	2
	Percentage (%)	49	43	7	1

CABG: coronary artery bypass graft; NYHA: New York heart association