Table 1.
Summary of some of the observational studies describing the VO2peak 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; HRmax: Maximum achieved heart rate; bpm: Beats per minute; NA: Not available.