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| Salbutamol is a β2-agonist of short duration commonly used in patients with asthma to prevent symptoms during or after exercise. Hemodynamic changes at rest are well described. However, there is little data on the effects on heart rate (HR) and blood pressure (BP) during exercise and recovery phase in patients with moderate or severe asthma A randomized, double-blind, cross-over study was conducted, including 15 individuals with moderate and severe asthma, mean age 46.4±9.3 years. Patients underwent a maximal 2-day exercise test with 400 mcg salbutamol or 4 placebo puffs. Throughout the protocol, HR, BP, perceived exertion and peak of expiratory flow (PEF) were monitored. After the use of salbutamol, the PEF value increased by a mean of 28.0±47.7L/m, remaining increased at 5, 10 and 15 minutes of passive recovery compared to placebo (p<0.05). The HR, BP and effort perception variables were similar across interventions at all stages of the protocol (p>0.05). These results suggest that the use of salbutamol is safe and that HR does not need to be adjusted to prescribe exercise intensity following salbutamol administration in subjects with moderate or severe asthma.

fisioterapia e pesquisa

Efeito agudo do salbutamol no sistema cardiovascular durante o exercício físico em pacientes com asma moderada ou grave: estudo aleatorizado, duplo-cego e cruzado