Related Experiment Video
Updated: Feb 21, 2026
Technical Aspects of the Mouse Aortocaval Fistula
Published on: July 11, 2013
The complex relationship among arteriovenous access, heart, and circulation
1Clinical Research Branch, Division of Nephrology, Miulli General Hospital, Acquaviva delle Fonti, Italy.
Insights
Arteriovenous fistulas (AVFs) are crucial for hemodialysis but can cause heart failure due to high blood flow. Evaluating and managing AVF flow rates is essential for patient cardiovascular health.
Area of Science:
- Nephrology
- Cardiology
- Vascular Surgery
Background:
- Over 400,000 patients in the US undergo hemodialysis, with >50% mortality from cardiovascular events.
- Most hemodialysis patients utilize arteriovenous fistulas (AVFs) for vascular access.
- AVFs are linked to adverse cardiac function, but their precise role in cardiovascular morbidity requires clarification.
Discussion:
- High-flow AVFs can lead to high-output heart failure, a known complication.
- Paradoxically, AVFs may offer cardiopulmonary benefits in conditions like severe COPD.
- The fundamental AVF concept saves lives, yet managing high blood flow rates remains challenging.
Key Insights:
- AVF blood flow rates are difficult to accurately evaluate.
- The direct contribution of AVFs to cardiovascular morbidity is not fully understood.
- Balancing the benefits and risks of AVF hemodynamics is critical for patient outcomes.
Outlook:
- Further research is needed to develop reliable methods for evaluating AVF flow rates.
- Improved strategies for managing AVF hemodynamics could reduce cardiovascular complications.
- Optimizing AVF management may enhance survival rates for hemodialysis patients.
Abstract:
There are currently near 400 000 patients on hemodialysis in the United States. More than 50% of those treated by chronic hemodialysis die because of a cardiovascular (CV) event. The majority of these patients have functional arteriovenous fistulas (AVFs). AVFs have an adverse effect on cardiac function, but their exact contribution to CV morbidity is not clear. It has long been known that a vascular access with an inappropriately high-flow rate may cause high-output heart failure. Paradoxically, there may be hemodynamic and cardiopulmonary benefits conferred by AVF particularly in severe chronic obstructive pulmonary disease. While Brescia-Cimino`s basic idea of the AVF has saved millions of lives, we would like to stress that there are dangers from their often high blood flow rates, which unfortunately have proved difficult to evaluate.
Related Concept Videos
01:19Anastomoses
Anastomoses can be formed at arterial, venous, and lymphatic vessels.
Arterial Anastomosis: These occur between arteries. They...
01:11Overview of Systemic Arteries
Systemic circulation is the part of the cardiovascular system that carries oxygenated blood away from the heart to the body's tissues and returns deoxygenated blood back to the...
01:14Overview of the Cardiovascular System
Heart
The heart is the central pump of the cardiovascular system that circulates blood throughout the body. It comprises two atria receiving the blood and two ventricles pumping blood out of the heart. Their rhythmic contractions, called heartbeats, ensure that blood flow remains continuous.
Blood Vessels
Blood...
01:26Arteries of the Head and Neck
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...
01:14Overview of Blood Vessels
Arteries and Arterioles: Arteries are muscular and elastic vessels that primarily carry oxygenated blood from the heart to body tissues, except for the pulmonary artery, which carries deoxygenated blood. They have thick walls to withstand high pressure and contain a layer of muscle tissue, allowing them to expand or contract as...
01:20Anatomy of Blood Vessels
Arteries
Arteries circulate oxygenated blood from the heart, except the pulmonary artery, which transports deoxygenated blood to the lungs. Large arteries, such as the aorta,...