Table 2

Results of 48 hour ambulatory electrocardiography

Subject (age) (years)	HR 4 RR (beats/min)	HR 1 min (beats/min)	AV II	VES (no/24 h)	Multiform VES	Ventricular couplets	R on T	VT	SVES > 100/24 h
Veteran athletes
1 (77)	37	48		125	×				×
2 (77)	39	46		22050	×	×	×
3 (76)	26	43	Type 2	39	×	×			×
4 (75)	35	40		2800					×
5 (73)	36	44		5		×			×
6 (71)	36	46		33	×	×			×
7 (71)	40	52	Type 1	158	×	×	×	× (3 beats)	×
8 (71)	38	54		52	×				×
9 (71)	45	53		33	×				×
10 (71)	44	53		13					×
11 (68)	44	49		12	×	×

Controls
1 (79)	54	55		2
2 (78)	44	57	Type 1	8
3 (78)	49	51		17				× (5 beats)
4 (75)	40	52		2					×
5 (75)	42	52		37	×				×
6 (75)	56	61		48		×		× (4 beats)	×
7 (74)	47	53		76		×			×
8 (74)	41	48		12
9 (73)	58	59		1
10 (72)	45	53		3
11 (71)	48	52		69	×	×
12 (70)	42	56		71

All subjects were in sinus rhythm.
HH 4 RR, lowest heart rate calculated from 4 RR intervals; HR 1 min, lowest heart rate during 1 minute; VES, ventricular extrasystoles; SVES, supraventricular extrasystoles.