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1.
Arq. bras. cardiol ; 76(4): 273-84, abr. 2001.
Article in Portuguese, English | LILACS | ID: lil-285831

ABSTRACT

OBJETIVE: The evaluation, by exercise stress testing, of the cardiorespiratory effects of pyridostigmine (PYR), a reversible acetylcholinesterase inhibitor. METHODS: A double-blind, randomized, cross-over, placebo-controlled comparison of hemodynamic and ventilation variables of 10 healthy subjects who underwent three exercise stress tests (the first for adaptation and determination of tolerance to exercise, the other two after administration of placebo or 45mg of PYR). RESULTS: Heart rate at rest was: 68 + or - 3 vs 68 + or - 3bpm before and after placebo, respectively (P=0.38); 70 + or - 2 vs 59 + or - 2bpm, before and after pyridostigmine, respectively (P<0.01). During exercise, relative to placebo: a significantly lower heart rate after PYR at, respectively, 20 per cent (P=0.02), 40 per cent (P=0.03), 80 per cent (P=0.05) and 100 per cent (P=0.02) of peak effort was observed. No significant differences were observed in arterial blood pressure, oxygen consumption at submaximal and maximal effort, exercise duration, respiratory ratio, CO2 production, ventilation threshold, minute ventilation, and oxygen pulse. CONCLUSION: Pyridostigmine, at a dose of 45mg, decreases heart rate at rest and during exercise, with minimal side effects and without interfering with exercise tolerance and ventilation variables.


Subject(s)
Humans , Male , Female , Adult , Cholinesterase Inhibitors/pharmacology , Exercise Test/drug effects , Pyridostigmine Bromide/pharmacology , Double-Blind Method , Heart Rate/drug effects , Oxygen Consumption/drug effects
2.
Rev. bras. med. esporte ; 6(2): 40-43, mar.-abr. 2000.
Article in Portuguese | LILACS | ID: lil-351584

ABSTRACT

Em 1997 a FIMS (Federação Internacional de Medicina do Esporte) publicou sua declaração de posicionamento sobre o tema: "AIDS E ESPORTES", cuja tradução foi posteriormente publicada na Revista Brasileira de Medicina do Esporte. Entretanto, tal publicação não menciona a existência da quimioprofilaxia após exposição (QP) ao HIV, prática estabelecida e de suam importância para o médico do esporte. O objetivo deste artigo é fazer uma revisão da literatura existente sobre tal asssunto, discutindo questões éticas, relação reico/benefício e indicações da quimioprofilaxia após exposição ao Vírus da Imunodeficiência Humana, enfocando as possibilidades de transmissão em ambiente esportivo. Além disso, também fazemos uma explanação das drogas mais utilizadas e as posologias indicadas


Subject(s)
Humans , Chemoprevention , HIV Infections/prevention & control , Sports , Anti-HIV Agents , HIV Infections/transmission
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