Publications by authors named "Luis Fernando Deresz"
Article Synopsis
- Exercise oscillatory ventilation (EOV) is important for diagnosing chronic heart failure but is difficult to identify due to technical issues; this study focuses on developing software to simplify and standardize this diagnosis from cardiopulmonary exercise test data.
- The software, built using LabVIEW, incorporates multiple EOV definitions and analysis techniques, allowing for visual representation of ventilatory responses and reliability testing through two raters and repeat measurements after six months.
- Results showed strong reliability for the EOV diagnoses with high inter-rater and intra-rater agreement (Cohen's kappa > 0.80), and the software, along with a tutorial, is available for free download.
Sensitivity and specificity of different exercise oscillatory ventilation definitions to predict 2-year major adverse cardiovascular outcomes in chronic heart failure patients.
Gustavo Dos Santos Ribeiro Luís Fernando Deresz Elisabetta Salvioni Dominique Hansen Piergiuseppe Agostoni
Int J Cardiol
August 2022
Article Synopsis
- This study investigates the effectiveness of three diagnostic definitions of exercise oscillatory ventilation (EOV) in predicting heart failure complications over two years.
- Results showed that the Corrà definition was the most accurate for predicting major cardiovascular events, with EOV being present in 17.2% of patients using this definition.
- Key findings highlighted that EOV was linked to higher MECKI scores and VE/VCO slope values, with differences observed in BNP levels between EOV-positive and EOV-negative patients.
Article Synopsis
- The study aimed to determine how closely heart rate readings at the first ventilatory threshold (HR) match heart rate readings at the end of a 6-minute walk test (HR) in patients with coronary artery disease (CAD) who are taking β-blockers.
- The research involved 17 stable CAD patients who underwent a cardiopulmonary exercise test and a 6-minute walk test on different days, with data analyzed using various statistical methods to assess the agreement between HR measurements.
- Results showed a good correlation (r=0.84) between the two heart rate readings, indicating that the HR can be effectively used to guide exercise intensity in cardiac rehabilitation for these patients.
Article Synopsis
- Heart rate variability (HRV) is an important indicator of cardiovascular health and is generally lower in people living with HIV (PLWH).
- This study examined the impact of a short-term aerobic training program on HRV and endothelial function in this group.
- After completing 24 sessions of aerobic training, participants showed significant improvements in several HRV measures, indicating that short-term exercise can benefit heart health for men living with HIV.
Article Synopsis
- Exercise training effectively reduces oxidative stress in people living with HIV/AIDS (PLWHA) on antiretroviral therapy, as shown by changes in oxidative stress markers after an 8-week training program.
- Participants engaged in aerobic, resistance, or concurrent training, resulting in significant decreases in the glutathione disulphide/glutathione ratio (GSSG/GSH) and thiobarbituric acid-reactive substances (TBARS).
- All subjects in the resistance training group increased muscle strength by an average of 37%, highlighting exercise's role in rehabilitation and its safety for improving health outcomes in PLWHA.
Article Synopsis
- The study aimed to compare cardiopulmonary responses during exercise in physically inactive individuals living with HIV/AIDS (PLWHA) and healthy individuals, using a treadmill exercise test.* -
- Results indicated no significant differences in functional capacity and ventilatory efficiency between the two groups, suggesting that PLWHA with well-controlled disease can maintain similar exercise capabilities as healthy sedentary subjects.* -
- The findings support the possibility of using simpler aerobic assessment methods in PLWHA when advanced exercise testing is not available.*
This cross-sectional study evaluated the food intake patterns related to cardiovascular risk disease among people living with HIV/AIDS (PLWHA) with viral suppression and receiving highly active antiretroviral therapy (HAART). Food intake was obtained by the annual food frequency questionnaire, separated into two groups, healthy and unhealthy food related intake and cardiovascular disease. Data were analyzed using Student's t Test for independent samples or the Mann-Whitney U Test and Fisher's exact test, with a significance level of p < 0.
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- Heart rate variability (HRV) is a key indicator of heart autonomic function, but its analysis can be affected by how data is collected and any artifacts present in the measurements.
- The study involved tracking RR intervals from 56 individuals, including patients and athletes, using various methods to identify and correct data artifacts, revealing that correction techniques were consistent but selection methods significantly impacted analysis outcomes.
- Ultimately, the study concluded that specific data selection methods can influence HRV analysis, suggesting that using a confidence interval and retaining stable data points is best for accurate results in short-term recordings.