Related Experiment Video
Updated: Jul 6, 2026
07:31
A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats
Published on: December 2, 2016
Cardiac remodeling in obesity.
E Dale Abel1, Sheldon E Litwin, Gary Sweeney
1Department of Biology, York University, Toronto, Canada.
Physiological Reviews
|April 9, 2008
Summary
Obesity increases heart disease risk but paradoxically reduces mortality. This review explores how obesity impacts heart structure and function, focusing on adipokines like adiponectin.
Area of Science:
- Cardiovascular Medicine
- Metabolic Disorders
- Physiology
Background:
- Rising obesity rates correlate with increased cardiovascular disease.
- Obesity presents a paradox: higher cardiac disease susceptibility but lower mortality.
- Understanding obesity's cardiovascular effects is crucial.
Purpose of the Study:
- To review how obesity influences heart structure and function.
- To explore mechanisms linking obesity to cardiac remodeling.
- To discuss the roles of adipokines, particularly leptin and adiponectin.
Main Methods:
- Review of human and animal model studies.
- Analysis of clinical observations and physiological data.
- Examination of current hypotheses on obesity-related cardiac changes.
Main Results:
- Obesity alters cardiac structure and function through complex hemodynamic and metabolic interactions.
- Adipokines, such as leptin and adiponectin, play significant roles in obesity-related cardiovascular complications.
- Adiponectin shows promise as a cardioprotective agent.
Conclusions:
- Obesity's impact on the heart is multifaceted and stage-dependent.
- Further research is needed to fully elucidate the obesity paradox in cardiovascular disease.
- Targeting adipokines may offer therapeutic strategies for obesity-related heart conditions.
Related Concept Videos
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
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...
01:29Cardiomyopathy 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...
01:17Pathophysiology of Heart Failure
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
01:24Obesity
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
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...