Related Experiment Video
Updated: Jun 5, 2026
06:10
Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
Published on: June 12, 2021
Left ventricular assist improves autonomic imbalance in patients with persistent myocardial dysfunction
Ajmal Gardiwal1, Philipp Roentgen, Ulrich Luesebrink
1Department of Cardiovascular Medicine, Hannover Medical School, Hannover, Germany. gardiwal@gmail.com
The International Journal of Artificial Organs
|December 28, 2010
Summary
Left ventricular assist devices (LVAD) restore autonomic function in heart failure patients. Studies show LVADs improve heart rate variability (HRV), a key indicator of autonomic balance, in end-stage heart failure.
Area of Science:
- Cardiology
- Autonomic Nervous System Research
- Medical Device Technology
Background:
- End-stage heart failure (HF) is often characterized by autonomic derangement, evidenced by reduced heart rate variability (HRV).
- Reduced HRV in chronic HF has independent prognostic value.
- Left ventricular assist devices (LVADs) are a therapeutic option for end-stage HF.
Purpose of the Study:
- To investigate autonomic function restoration after LVAD implantation.
- To assess if autonomic function improves in patients with persistent, severely depressed left ventricular function post-LVAD.
Main Methods:
- Ambulatory Holter ECG recordings were obtained from 8 HF patients with LVADs and 7 age-matched HF patients without LVADs.
- All patients received optimal medical therapy.
- Cardiac dimensions and function were evaluated using echocardiography or angiography.
Main Results:
- Heart failure patients without LVADs exhibited reduced HRV metrics (SDNN, SDANN, triangular index).
- LVAD recipients showed significant restoration of HRV, with normal SDNN, SDANN, and triangular index values.
- These HRV improvements in the LVAD group were statistically significant compared to the non-LVAD group (p<0.01).
Conclusions:
- Autonomic imbalance, indicated by severely reduced HRV, is restored in end-stage HF patients following LVAD implantation.
- LVADs effectively unload the failing heart, leading to improved autonomic function.
- LVAD therapy can reverse HRV reduction associated with chronic heart failure.
Related Concept Videos
01:29Cardiomyopathy V: Interprofessional Care
Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
01:30Cardiomyopathy II: Dilated Cardiomyopathy
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
01:30Heart Failure V: Medical Management
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...
01:22Heart Failure VI: Adjunct Therapies
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.
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
01:26Imbalances in Cardiac Output
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...