| dc.description.abstract | The ergometric test is one of the most important medical examinations in order to diagnose
coronary disease. However, it shows a great limitation, because individuals get tired even
before they have reached a predefined cardiac frequency (CF). In the developed research, it
is proposed the application of BiPAP technique during the ergometric test as a means of
prolonging the period of testing and improving its performance for the coronary disease
diagnostic. As a volunteer adaptation to the breathing booster device, the 12 min walking test
before the ergometric one was performed. A group of 31 male coronary patients, 50 up to 68
years old, participated of the walking test and 30 patients, of the ergometric one. The
volunteers were submitted to an experimental protocol consisted of 2 stages: in the first one,
without the breathing booster device, and in the second one, using it. For the 12 min walking
test, it was compared the variations of the coursed distance and the cardiac frequency
achieved between the 2 stages. Along the ergometric test, it was measured and compared the
cardio-respiratory parameters: arterial pressure, cardiac frequency, metabolic equivalent,
double product, oxygen consumption, oxygen saturation and lactic acid. With the application
of the clinical protocol, we tried to reach the maximum cardiac frequency (CFM), and to
provoke the appearing of late exhaustion and fatigue, which influence the coronary disease
diagnostic. For the ergometric test, using the BiPAP technique, the results had shown
volunteers wickedly physical performance, reaching no CFM and moreover initiating the
process of breathing fatigue precociously. On the walk test, with moderated effort, the
volunteers overcame the walked distance in relation to the walking without the use of the
breathing booster device, indicating, on this way, that the BiPAP technique can promote an
increase of the distance and of FC. For the ergometric test, however, we concluded that the
BiPAP technique does not increase metabolic and physiologic parameters which can
improve the sensitivity and precision of the coronary disease diagnostic, considering that it
had produced a reduction of breathing work and oxygen saturation, bringing to dyspnea and
to respiratory fatigue precociously, respectively. | |
