Related Experiment Video
Updated: Mar 24, 2026
12:37
Surgical Placement of Catheters for Long-term Cardiovascular Exercise Testing in Swine
Published on: February 9, 2016
14.0K
Exercise physiology in chronic mechanical circulatory support patients: vascular function and beyond.
Christopher S Hayward1, Libera Fresiello, Bart Meyns
1aHeart Failure and Transplant Unit, Victor Chang Cardiac Research Institute, St Vincent's Hospital, University of New South Wales, Sydney, New South Wales, Australia bDepartment of Cardiovascular Sciences, Clinical Cardiac Surgery, Katholieke Universiteit Leuven, Leuven, Belgium.
Current Opinion in Cardiology
|March 6, 2016
Summary
Left ventricular assist devices (LVADs) improve exercise capacity, but full normalization remains elusive. Future research should focus on optimizing pump function and patient condition for complete physiological recovery.
Area of Science:
- Cardiovascular Engineering
- Medical Device Technology
- Exercise Physiology
Background:
- Left ventricular assist devices (LVADs) are increasingly used for long-term support, exceeding 2 years.
- Patient expectations have shifted from mere survival to functional capacity and exercise outcomes.
- Assessing functional capacity is crucial for evaluating LVAD technology effectiveness.
Purpose of the Study:
- To review current research on functional capacity and exercise outcomes in patients with LVADs.
- To identify limitations in exercise performance despite improved resting hemodynamics.
- To explore factors influencing exercise capacity in LVAD recipients.
Main Methods:
- Review of recent studies on LVADs focusing on functional capacity and exercise.
- Analysis of factors affecting exercise performance, including pump function, residual cardiac function, and autonomic nervous system interactions.
- Examination of resting hemodynamics and their relation to exercise capacity.
Main Results:
- Significant improvements in functional class and walking distance are observed in LVAD patients.
- Complete normalization of exercise capacity is not achieved, even with improved resting hemodynamics.
- Pump output increases with exercise due to preload, afterload, and pump curves, with residual heart function playing a role.
Conclusions:
- Optimization of LVAD pump function through active speed modulation is needed.
- Addressing the overall patient condition is essential for enhancing exercise performance.
- Further research is required to achieve full functional and physiological recovery in LVAD recipients.
Related Concept Videos
01:17Exercise and Cardiac Output
2.5K
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be...
Sustained exercise increases the muscles' oxygen demand, which can be...
2.5K
01:22Heart Failure VI: Adjunct Therapies
537
Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
537
01:20Exercise and Cardiovascular Response
5.0K
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
5.0K
01:29Cardiomyopathy VI: Nursing Management
451
Assessment: Nursing management of patients with cardiomyopathy begins with a thorough assessment of the patient's history, including a family history of cardiomyopathy or sudden cardiac death, personal history of heart disease, hypertension, diabetes, and any alcohol consumption or drug use.During the physical examination, assess vital signs, look for signs of heart failure (such as edema, jugular venous distention, and cyanosis), auscultate for abnormal heart sounds (like murmurs and gallops),...
451
01:30Heart Failure V: Medical Management
512
Medical Management of Acute Decompensated Heart Failure (ADHF)The primary goals of therapy for patients hospitalized with acute decompensated heart failure (ADHF) include:Relieving symptomsOptimizing volume statusSupporting oxygenation and ventilationMaintaining cardiac output (CO) and end-organ perfusionIdentifying and addressing the cause of ADHFPreventing complicationsProviding patient education on factors precipitating HF exacerbationPlanning for dischargeOngoing monitoring and assessment...
512
01:30Heart Failure VII: Nursing Interventions
684
The first step in nursing management of a patient with heart failure involves thoroughly assessing the patient's medical history.Subjective Data: Obtain the patient's medical history of coronary artery disease, hypertension, myocardial infarction, and symptoms like dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.Objective Data: Conduct a physical examination to identify findings such as jugular vein distention, pulmonary crackles, tachycardia, murmurs, peripheral edema, and vital signs,...
684