SESSION TITLE: COPD Comorbidity Posters
SESSION TYPE: Poster Presentations
PRESENTED ON: Saturday, March 22, 2014 at 01:15 PM - 02:15 PM
PURPOSE: To examine characteristics and related factors of abnormal heart rate recovery. Some COPD patients suffer autonomic cardiac dysfunction, having a decrease in parasympathetic activity and an increase in sympathetic activity, as reflected in the high resting heart rate, a reduced variability heart rate (HRV) and an abnormal heart rate recovery (HRR) after exercise
METHODS: A total of 18 patients ( 7 males ) with COPD were analyzed in a descriptive and cross sectional study. 4 patients GOLD 1 -2, and 14 patients GOLD 3 - 4 underwent 6-minute walk test (6-MWT ) with SpiropalmTM equipment. The value for the recovery of heart rate was defined as the reduction in the heart rate from the rate at peak exercise to the rate one minute after the cessation of exercise ( Normal value is higher than 14 beats/min ). Pearson correlation was applied to determine the relationship between anthropometric, spirometric and functional variables and HRR. Multiple regression analysis was used
RESULTS: There were no differences in variables between men and women. The mean FEV1 was 47,4% ± 17,4. Mean distance in 6-MWT was 463 meters ±130. 50% of patients had adequated HRR. The correlation between HRR with age and airway obstruction were (r= - 0,43; p= 0,24 ) and ( r= - 0,015; p= 0,96 ) respectively. Meters in 6MWT ( r: 0,29; p = 0,86), resting heart rate (r: 0,32; p = 0,40) and body mass index ( r: 0,16; p = 0,66 ) had a directly proportional correlation with the HRR.
CONCLUSIONS: Age and airflow obstruction seem to be factors related to an abnormal HRR in patients with COPD. These results are in line with the findings of other authors.
CLINICAL IMPLICATIONS: HRR in the 6MWT in patients with COPD could be used as an indicator of autonomic dysfunction. 6-MWT is a rapid assessment and a low cost technique to evaluate HRR
DISCLOSURE: The following authors have nothing to disclose: Luis Carlos Morillo, Giorsari Quezada, Maria Enriquez, Cecilia Oropeza, Efrain Sanchez, Agustin Acuña, José Isea Dubuc
6-MWT is a rapid assessment and a low cost technique to evaluate HRR.