The Korean Journal of Sports Medicine

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Table. 2.

Table. 2.

Characteristics of patients with and without chronotropic incompetence (CI)

Characteristic Total CI group No CI group p-value
No. of patients 111 45 66
Age (yr) 16.2±1.8 15.9±2.1 16.3±1.6 0.186
Male sex 61 (55.0) 26 (57.8) 35 (53.0) 0.625
Body mass index (kg/m2) 20.6±3.5 20.5±3.3 20.7±3.8 0.829
Birth weight (kg) 3.0±0.5 2.9±0.5 3.1±0.5 0.174
Cyanosis 19 (17.1) 13 (28.9) 6 (9.1) 0.012
No. of surgical procedures 2.6±1.6 3.9±1.9 2.1±1.1 <0.001
No. of medications 1.43±1.8 2.2±2.1 0.9±1.2 <0.001
Rest SaO2 (%) 97.3±3.2 97.1±3.3 97.5±3.1 0.572
Rest HR (beats/min) 75.5±13.9 78.0±16.1 73.8±12.0 0.136
Peak HR (beats/min) 180.0±19.2 161.8±15.4 192.4±8.8 <0.001
HR reserve (beats/min) 104.5±22.1 83.7±16.6 118.7±11.8 <0.001
Rest SBP (mm Hg) 119.8±18.7 113.9±18.2 123.9±18.0 0.005
Rest DBP (mm Hg) 70.6±12.8 65.9±9.7 73.8±13.6 0.001
Peak SBP (mm Hg) 144.6±21.7 141.2±23.9 146.9±19.8 0.194
Peak DBP (mm Hg) 66.1±13.5 65.5±16.0 66.4±11.7 0.738
Peak O2 pulse (mL/beat) 9.7±5.6 9.2±4.6 10.0±6.1 0.773
Peak VO2 (mL/kg/min) 31.5±8.2 27.3±7.3 34.4±7.6 <0.001
RER 1.13±0.11 1.09±0.10 1.15±0.10 0.002
RPE 16.9±1.4 16.8±1.8 17.0±1.2 0.545
Physical activity (METs-hr/wk) 16.0 (10.0−30.0) 10.7 (7.3−16.3) 22.8 (11.5−36.7) <0.001

Values are presented as number only, mean±standard deviation, number (%), or median (interquartile range).

SaO2: oxygen saturation, HR: heart rate, SBP: systolic blood pressure, DBP: diastolic blood pressure, O2 pulse: oxygen pulse, VO2: oxygen uptake, RER: respiratory exchange ratio, RPE: ratings of perceived exertion, MET: metabolic equivalent.

Korean J Sports Med 2022;40:86-93 https://doi.org/10.5763/kjsm.2022.40.2.86
© 2022 Korean J Sports Med