CAMILA PAIXAO JORDAO
Projetos de Pesquisa
Unidades Organizacionais
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina
36 resultados
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Agora exibindo 1 - 10 de 36
- Exercise Training Preserves Myocardial Strain and Improves Exercise Tolerance in Doxorubicin-Induced Cardiotoxicity(2021) GOMES-SANTOS, Igor L.; JORDAO, Camila P.; PASSOS, Clevia S.; BRUM, Patricia C.; OLIVEIRA, Edilamar M.; CHAMMAS, Roger; CAMARGO, Anamaria A.; NEGRAO, Carlos E.Doxorubicin causes cardiotoxicity and exercise intolerance. Pre-conditioning exercise training seems to prevent doxorubicin-induced cardiac damage. However, the effectiveness of the cardioprotective effects of exercise training concomitantly with doxorubicin treatment remains largely unknown. To determine whether low-to-moderate intensity aerobic exercise training during doxorubicin treatment would prevent cardiotoxicity and exercise intolerance, we performed exercise training concomitantly with chronic doxorubicin treatment in mice. Ventricular structure and function were accessed by echocardiography, exercise tolerance by maximal exercise test, and cardiac biology by histological and molecular techniques. Doxorubicin-induced cardiotoxicity, evidenced by impaired ventricular function, cardiac atrophy, and fibrosis. Exercise training did not preserve left ventricular ejection fraction or reduced fibrosis. However, exercise training preserved myocardial circumferential strain alleviated cardiac atrophy and restored cardiomyocyte cross-sectional area. On the other hand, exercise training exacerbated doxorubicin-induced body wasting without affecting survival. Finally, exercise training blunted doxorubicin-induced exercise intolerance. Exercise training performed during doxorubicin-based chemotherapy can be a valuable approach to attenuate cardiotoxicity.
bookPart Prescrição de exercício físico na prevenção e reabilitação cardiovascular(2019) RONDON, Eduardo; OLIVEIRA, Patricia Alves de; AGOSTINHO, Daniela Regina; JORDãO, Camila Paixão; SANTOS, Mayara Alves dos; PELAQUIM, Renato Lopes- Exercise training preserves vagal preganglionic neurones and restores parasympathetic tonus in heart failure(2016) ICHIGE, Marcelo H. A.; SANTOS, Carla R.; JORDAO, Camila P.; CERONI, Alexandre; NEGRAO, Carlos E.; MICHELINI, Lisete C.Exercise training is an efficient tool to attenuate sympathoexcitation, a hallmark of heart failure (HF). Although sympathetic modulation in HF is widely studied, information regarding parasympathetic control is lacking. We examined the combined effects of sympathetic and vagal tonus to the heart in sedentary (Sed) and exercise trained (ET) HF rats and the contribution of respective premotor and preganglionic neurones. Wistar rats submitted to coronary artery ligation or sham surgery were assigned to training or sedentary protocols for 6weeks. After haemodynamic, autonomic tonus (atropine and atenolol i.v.) and ventricular function determinations, brains were collected for immunoreactivity assays (choline acetyltransferase, ChATir; dopamine -hydroxylase, DBHir) and neuronal counting in the dorsal motor nucleus of vagus (DMV), nucleus ambiguus (NA) and rostroventrolateral medulla (RVLM). HF-Sed vs. SHAM-Sed exhibited decreased exercise capacity, reduced ejection fraction, increased left ventricle end diastolic pressure, smaller positive and negative dP/dt, decreased intrinsic heart rate (IHR), lower parasympathetic and higher sympathetic tonus, reduced preganglionic vagal neurones and ChATir in the DMV/NA, and increased RVLM DBHir. Training increased treadmill performance, normalized autonomic tonus and IHR, restored the number of DMV and NA neurones and corrected ChATir without affecting ventricular function. There were strong positive correlations between parasympathetic tonus and ChATir in NA and DMV. RVLM DBHir was also normalized by training, but there was no change in neurone number and no correlation with sympathetic tonus. Training-induced preservation of preganglionic vagal neurones is crucial to normalize parasympathetic activity and restore autonomic balance to the heart even in the persistence of cardiac dysfunction.
conferenceObject Low-intensity laser therapy on vascular reactivity and blood pressure in police officers(2020) DEMOURA, Jose Roberto; ALVES, Cleber Rene; LENOS JUNIOR, Jose Ribeiro; FONSECA, Felipe Xerez Cepeda; CORREIA, Marilia Almeida; JORDAO, Camila Paixao; DALBONI, Maria Aparecida; CHAVANTES, Maria Cristina; TROMBETTA, Ivani CredidioconferenceObject Cardiac rehabilitation in patients with refractory angina: preliminary results(2019) DOURADO, L.; ASSUMPCAO, C. R. A. A.; JORDAO, C. P.; VIEIRA, M. L. C.; GOWDAK, L. H. W.; CESAR, L. A. M.; MATOS, L. D. N. J.- Cardiopulmonary exercise test in patients with refractory angina: functional and ischemic evaluation(2022) ASSUMPCAO, Camila R. A. de; PRADO, Danilo M. L. do; JORDAO, Camila P.; DOURADO, Luciana O. C.; VIEIRA, Marcelo L. C.; MONTENEGRO, Carla G. de S. P.; NEGRAO, Carlos E.; GOWDAK, Luis H. W.; MATOS, Luciana D. N. J. DeObjectives: Refractory angina (RA) is a chronic condition clinically characterized by low effort tolerance; therefore, physical stress testing is not usually requested for these patients. Cardiopulmonary exercise testing (CPET) is con-sidered a gold standard examination for functional capacity evaluation, even in submaximal tests, and it has gained great prominence in detecting ischemia. The authors aimed to determine cardiorespiratory capacity by using the oxygen consumption efficiency slope (OUES) in patients with refractory angina. The authors also stud-ied the O-2 pulse response by CPET and the association of ischemic changes with contractile modifications by exer-cise stress echocardiography (ESE). Methods: Thirty-one patients of both sexes, aged 45 to 75 years, with symptomatic (Canadian Cardiovascular Soci-ety class II to IV) angina who underwent CPET on a treadmill and exercise stress echocardiography on a lower limb cycle ergometer were studied. ClinicalTrials.gov: NCT03218891. Results: The patients had low cardiorespiratory capacity (OUES of 1.74 +/- 0.4 L/min; 63.9 +/- 14.7% of predicted), and 77% of patients had a flattening or drop in O-2 pulse response. There was a direct association between Heart Rate (HR) at the onset of myocardial ischemia detected by ESE and HR at the onset of flattening or drop in oxygen pulse response detected by CPET (R = 0.48; p = 0.019). Conclusion: Patients with refractory angina demonstrate low cardiorespiratory capacity. CPET shows good sensi-tivity for detecting abnormal cardiovascular response in these patients with a significant relationship between flattening O-2 pulse response during CEPT and contractile alterations detected by exercise stress echocardiography.
conferenceObject Swimming training improves arterial vasomotor function in spontaneously hypertensive rats: role of reactive oxygen species and nitrogen(2014) JORDAO, C. P.; FERNANDES, T.; TANAKA, L.; OLIVEIRA, L. G.; BECHARA, L. G.; OLIVIERA, E. M.; RAMIRES, P. R.conferenceObject Early findings in patients with noncompaction cardiomyopathy and normal ejection fraction: a cardiopulmonary exercise test, echocardiographic and biomarkers study(2019) AOKI, A. F.; SANTOS, M. R. Dos; ANDRETTA, C. R. L.; YEU, S. P.; MELO, M. D. Tavares De; JORDAO, C. P.; GUIMARAES, G. V.; STRUNZ, C. M. C.; BOCCHI, E. A.; SALEMI, V. M. C.conferenceObject Obstructive sleep apnea impairs insulin resistance in metabolic syndrome patients with normal levels of glucose(2016) CEPEDA, Felipe Xerez; RODRIGUES, Sara; DUTRA-MARQUES, Akothirene C. B.; CARVALHO, Jefferson Cabral; TOSCHI-DIAS, Edgar; JORDAO, Camila Paixao; RONDON, Maria Urbana; ALVES, Maria Janieire N. N.; LORENZI-FILHO, Geraldo; TROMBETTA, Ivani Credidio- Effects of Exercise Training on Left Ventricular Diastolic Function Markers in Patients with Obstructive Sleep Apnea: A Randomized Study(2022) DURANTE, Bruno G.; FERREIRA-SILVA, Rosyvaldo; GOYA, Thiago T.; LIMA, Marta F.; RODRIGUES, Ana Clara T.; DRAGER, Luciano F.; JORDÃO, Camila P.; RODRIGUES, Amanda G.; ALVES, Maria Janieire de Nazare N.; LORENZI-FILHO, Geraldo; NEGRÃO, Carlos E.; UENO-PARDI, Linda M.Abstract Background Exercise training (ET) is an adjunctive treatment for obstructive sleep apnea (OSA) and its consequences. However, the effects of exercise on heart remodeling are unknown in the population with OSA. Objective We investigated the effect of ET on markers of diastolic function, sleep parameters, and functional capacity in patients with OSA. Methods Sedentary patients with OSA (apnea-hypopnea index, AHI ≥15 events/hr) were randomly assigned to untrained (n=18) and trained (n=20) strategies. Polysomnography, cardiopulmonary exercise test, and echocardiography were evaluated at the beginning and end of the study. ET consisted of 3 weekly sessions of aerobic exercise, resistance exercises, and flexibility training (72 sessions, completed in 11.65±0.86 months). A two-way analysis of variance (ANOVA) was used, followed by Tukey's post-hoc test. The level of statistical significance was set at p<0.05 for all analyses. Result Thirty-eight patients were included (AHI:45±29 events/hr, age:52±7 y, body mass index: 30±4 kg/m2). They had similar baseline parameters. ET caused a significant change in OSA severity (AHI:4.5±18 versus -5.7±13 events/hr; arousal index:1.5±8 versus -6.1±13 events/hr, in untrained and trained groups respectively, p<0.05). The trained patients had an increase in functional capacity after intervention. ET improved isovolumetric relaxation time (IVRT, untrained=6.5±17.3 versus trained=-5.1±17.1 msec, p<0.05). There was a significant correlation between changes in IVRT and arousal index in the trained group (r =-0.54, p<0.05). No difference occurred in the other diastolic function parameters evaluated. Conclusion ET promotes modest but significant improvement in AHI, functional capacity, and cardiac IVRT, a validated parameter of diastolic function.