Exertional dyspnea-related acidotic and sympathetic responses in patients with sequelae of pulmonary tuberculosis

Table 3 Correlations between the dyspnea-slope before and after the break point in the dyspnea-\( \dot{V} {\text{O}}_{2} \) relationship during exercise

The exercise-response slopes were calculated when the parameters were plotted against \( \dot{V} {\text{O}}_{ 2} \) from rest to the break point, or from the break point to the peak exercise point using linear regression analysis for each subject
TBsq, sequelae of pulmonary tuberculosis; \( \dot{V} {\text{O}}_{ 2} \) oxygen uptake; the break point, the dyspnea-\( \dot{V} {\text{O}}_{ 2} \) break point determined by each subject; PaO₂, arterial oxygen tension; PaCO₂, arterial carbon dioxide tension; LT, plasma lactate level; NE, plasma norepinephrine level
Dyspnea-slope (∆Borg scale/\( \Updelta \dot{V}_{\text{E}} \)) is expressed as L⁻¹ min, pH-slope (∆pH/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as L⁻¹ min, PaO₂-slope (∆PaO₂/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as mmHg L⁻¹ min, PaCO₂-slope (∆PaCO₂/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as mmHg L⁻¹ min, LT-slope (∆LT/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as mg dL⁻¹ L⁻¹ min, NE-slope (∆NE/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as ng mL⁻¹ L⁻¹ min, HR-slope (∆Heart rate/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as beats L⁻¹, f-slope (∆breathing frequency/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as breaths L⁻¹, V _T-slope (∆tidal volume/\( \Updelta \dot{V} {\text{O}}_{ 2} \)) as mL L⁻¹ min
NS not significant

ISSN: 1880-6562