Exercise after heart transplantation: An overview

Table 1 Summary of some of the observational studies describing the VO_2peak levels in heart transplant recipients

Study	n	Mean age (yr)	Mean time after HTx	VO2peak: mL/kg per minute or L/min	VO2peak (% of age-predicted value)	Percent of age-predicted HRmax or actual HRmax (bpm)
Renlund et al[123]	110	51 ± 10	26 mo	17.7 ± 0.3 mL	64% ± 1%	85%
Mandak et al[51]	60	52 ± 10	1 yr	16.2 ± 3.8 mL	NA	137 ± 24
Osada et al[124]	56	50 ± 12	3 yr	20.0 ± 5.0 mL	70% ± 17%	88% ± 11%
Notarius et al[12]	12	51 ± 4	8 mo	17.3 ± 1.7 mL	57%	147 ± 7
Douard et al[30]	85	52 ± 12	0-100 mo	21.1 ± 6 mL	NA	85% ± 13%
Squires et al[24]	95	48 ± 14	1 yr	19.9 ± 4.8 mL	61% ± 15%	138 ± 22
Gullestad et al[48]	174	51 ± 1	3.5 yr	19.4 ± 0.4 mL	70% ± 1%	146 ± 2
Myers et al[125]	47	47 ± 12	4.8 yr	9.4 ± 2.6 mL	59% ± 14%	129 ± 18
Schmid et al[126]	17	58 ± 13	65 ± 27	20.9 ± 5.2 mL	NA	136 ± 12
Richard et al[127]	7	40 ± 13	2 yr	NA	101% ± 12%	93% ± 9%
Carter et al[2]	47	48	5 yr	16.1 ± 0.5 mL	51% ± 1.5%	74% ± 1%
Ulubay et al[118]	7	43 ± 14	19 mo	1.45 ± 0.33 L	NA	114 ± 41

HTx: Heart transplant; HR_max: Maximum achieved heart rate; bpm: Beats per minute; NA: Not available.