Short term morbidity after elective cardiac surgery remains significant. Standard predictive models, considering simple patient demographics and clinical parameters, show limited efficiency in individual operative risk assessment. There is growing evidence about daily physical activity as a relevant indicator of preoperative "frailty". Although cardiopulmonary exercise testing remains a gold standard, we are looking for more simple tools in order to identify patients with poor physical condition. Accelerometry may be an objective and reproductible method to measure physical activity at patient's home.
The aim of this study is to compare accelerometer-assessed preoperative physical activity between two groups of patients with different postoperative length of stay following elective cardiac surgery. In the future, accelerometry could be used to identify patients that may benefit from prehabilitation programs including exercise therapy before elective cardiac surgery.
Study Type
OBSERVATIONAL
Enrollment
202
Patient will wear the accelerometer for 7 consecutive days to measure the level of physical activity.
Chu Saint-Etienne
Saint-Etienne, France
Mean daily preoperative walking activity (average of steps/day over a period of 7 days)
Measured by accelerometry.
Time frame: Day: 7
Total energy expenditure evaluated over a 7 days (steps/day)
Measured by accelerometry.
Time frame: Day: 7
Low activity time in hours per week (hours/week)
Measured by accelerometry.
Time frame: Day: 7
Moderate activity time in hours per week (hours/week)
Measured by accelerometry.
Time frame: Day: 7
Intense activity time in hours per week (hours/week)
Measured by accelerometry.
Time frame: Day: 7
Time of very intense activity in hours per week (hours/week)
Measured by accelerometry.
Time frame: Day: 7
Sleep time in hours per week (hours/week)
Measured by accelerometry.
Time frame: Day: 7
Analysis of questionary Duke Activity Status Index (DASI) over a period of 7 days
Questionary Duke Activity Status Index (DASI) estimates the maximum volume of oxygen used in one minute (VO2 Max) as well as its effort capacity in metabolic equivalent. It contains 11 items. The higher the score indicates better functional capacity.
Time frame: Day: 7
Analysis of questionary Short Nutritional Assessment Questionnaire (SNAQ) over a period of 7 days
Questionary Short Nutritional Assessment Questionnaire (SNAQ) evaluates nutritional status. The higher the score indicates an important nutritional support.
Time frame: Day: 7
Dosage of albumin (g/L)
Measured by blood sample.
Time frame: Day: 7
Dosage of prealbumin (g/L)
Measured by blood sample.
Time frame: Day: 7
Preoperative strength assessed by dynamometry (Kg)
Measured by Hand Grip test.
Time frame: Day: 14
Relationship between preoperative physical activity and duration of stay in intensive care
Correlation between preoperative physical activity and duration of stay in intensive care.
Time frame: Months: 26
Preoperative clinical outcome and duration of stay in intensive care
Correlation between preoperative clinical outcome and duration of stay in intensive care.
Time frame: Months: 26
Postoperative clinical outcome and duration of stay in intensive care
Correlation between postoperative clinical outcome and duration of stay in intensive care.
Time frame: Months: 26
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