Vascular and Metabolic Responses to Exercise Training in Heart Failure With or Without Type 2 Diabetes
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Heart Failure
- Sponsor
- Duke University
- Locations
- 1
- Primary Endpoint
- exercise capacity
- Status
- Withdrawn
- Last Updated
- 2 years ago
Overview
Brief Summary
The purpose of this study is to understand the differences in how patients with heart failure respond to exercise training compared to patients with heart failure and type 2 diabetes.
Detailed Description
The investigators will measure exercise capacity in patients with heart failure or heart failure plus type 2 diabetes prior to and following a 12-week exercise training program (5d/wk, 30 min/d, 60-75% VO2max) to determine whether improvements in exercise capacity in response to exercise training are mitigated in patients with combined heart failure plus type 2 diabetes.
Investigators
Eligibility Criteria
Inclusion Criteria
- •≥50 yr of age
- •New York Heart Association class II-III CHF and ejection fraction ≤35%
- •receiving optimal medical therapy
- •sedentary (≤ 30 min/wk structured physical activity).
- •Half of volunteers (n=30) will have a diagnosis of type 2 diabetes (CHF+T2D).
Exclusion Criteria
- •changes in medication ≤6 wk prior to enrollment
- •major cardiovascular event or procedure ≤6 wk prior to enrollment
- •foot ulcers
- •advanced neuropathy
- •co-morbidities or other limitations that may interfere with or prevent volunteers from safely completing the exercise training
- •fixed rate pacemaker
- •type 1 diabetes mellitus
Outcomes
Primary Outcomes
exercise capacity
Time Frame: baseline, 12 weeks
measured as peak oxygen consumption as well as treadmill time to exhaustion, also known as cardiopulmonary fitness
Secondary Outcomes
- flow-mediated dilation(baseline, 12 weeks)
- nitrite flux during exercise(baseline, 12 weeks)