Table 2 Cardiovascular findings at follow-up in men with low and high percentage of slow-twitch type I skeletal muscle fibers.
Type I fibers ≤60% (n = 20) | Type I fibers >60% (n = 20) | P | |
|---|---|---|---|
Heart rate (beats/min) | 64 (10) | 55 (9) | 0.006 |
Systolic blood pressure (mmHg) | 144 (21) | 138 (19) | 0.35 |
Diastolic blood pressure (mmHg) | 91 (8) | 85 (7) | 0.016 |
LV end-diastolic diameter (mm) | 51.6 (4.6) | 53.9 (4.3) | 0.13 |
LV end-diastolic diameter (mm/m2) | 25.1 (3.1) | 28.3 (3.1) | <0.001 |
LV end-systolic diameter (mm) | 31.7 (4.1) | 35.8 (3.9) | 0.003 |
LV end-systolic diameter (mm/m2) | 15.4(2.7) | 18.8 (2.5) | <0.001 |
Mean LV wall thickness (mm) | 10.8 (1.7) | 10,2 (1.2) | 0.25 |
Mean LV wall thickness (mm/m2) | 5.2 (0.7) | 5.4 (0.6) | 0.42 |
LV mass (g) | 215 (52) | 216 (52) | 0.95 |
LV mass (g/m2) | 104 (22) | 112 (25) | 0.22 |
Relative wall thickness | 0.42 (0.009) | 0.38 (0.05) | 0.07 |
LV fractional shortening (%) | 38.7 (4.3) | 33.7 (3.7) | <0.001 |