Table 1

Baseline parameters of the patients included in the study

Patient	Age at operation	Sex	Disease	Date of operation	Prosthesis	Cross clamp time (mins)	MAP recording (AF onset) (days)
Patients who did not develop atrial fibrillation or flutter
1	85	F	Aortic incompetence	07.10.94	SJM 23	47	6
2	61	M	Aortic stenosis	24.11.94	SJM 25	65	7
3	64	F	Aortic stenosis/aortic incompetence	12.12.94	SJM 23	70	6
4	41	M	Aortic incompetence/ aortic stenosis	11.01.95	SJM 23	56	7
5	29	M	Aortic incompetence/ aortic stenosis	01.03.95	(Ross)	115	4
6	72	F	Aortic stenosis	04.04.95	CE 23	93	7
7	85	F	Aortic stenosis	19.05.95	CE 21	46	10
8	58	M	Aortic stenosis	06.09.95	SJM 27	41	9
9	56	M	Aortic incompetence/ aortic stenosis	10.10.95	SJM 27	58	8
10	70	M	Aortic incompetence	20.10.95	SJM 23	102	7
11	57	M	Aortic incompetence	11.03.96	SJM 27	52	7
12	77	M	Aortic incompetence	29.04.96	SJM 27	39	8
13	62	M	Aortic stenosis	21.05.96	SJM 23	59	9
14	48	M	Aortic incompetence	16.09.96	SJM 25	53	7
15	82	F	Aortic stenosis	19.12.96	SJM 23	110	14
16	72	M	Aortic incompetence/ aortic stenosis	09.11.94	Med 27	44	7
Mean	63					66	8

Patients who did develop atrial fibrillation or flutter
1	49	F	Aortic stenosis/aortic incompetence	18.05.95	SJM 21	60	8 (1)^1-150
2	58	F	Aortic stenosis	10.01.96	SJM 25	41	10 (5, 8)
3	50	F	Aortic incompetence	13.03.96	SJM 27	78	9 (2, 3, 5)
4	76	M	Aortic incompetence/ aortic stenosis	16.04.96	SJM 25	87	7 (3)
5	73	M	Aortic stenosis/aortic incompetence	30.04.96	CE 23	40	6 (2)
6	75	M	Aortic incompetence	30.04.96	SJM 29	48	7 (4)
Mean	65					64	8 (3.5)

↵1-150 Numbers in parentheses are days after surgery when atrial fibrillation or flutter occurred.
SJM, St Jude Medical; CE, Carpentier-Edwards; Med, Medtronic.