Congestive Heart Failure (CHF)

  • Medical Author:
    Daniel Lee Kulick, MD, FACC, FSCAI

    Dr. Kulick received his undergraduate and medical degrees from the University of Southern California, School of Medicine. He performed his residency in internal medicine at the Harbor-University of California Los Angeles Medical Center and a fellowship in the section of cardiology at the Los Angeles County-University of Southern California Medical Center. He is board certified in Internal Medicine and Cardiology.

  • Medical Author: Benjamin Wedro, MD, FACEP, FAAEM
    Benjamin Wedro, MD, FACEP, FAAEM

    Dr. Ben Wedro practices emergency medicine at Gundersen Clinic, a regional trauma center in La Crosse, Wisconsin. His background includes undergraduate and medical studies at the University of Alberta, a Family Practice internship at Queen's University in Kingston, Ontario and residency training in Emergency Medicine at the University of Oklahoma Health Sciences Center.

  • Medical Editor: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

Quick GuideHeart Health Pictures Slideshow: 12 Possible Heart Symptoms Never to Ignore

Heart Health Pictures Slideshow: 12 Possible Heart Symptoms Never to Ignore

What is congestive heart failure (CHF)?

Heart failure describes the inability or failure of the heart to adequately meet the needs of organs and tissues for oxygen and nutrients. This decrease in cardiac output, the amount of blood that the heart pumps, is not adequate to circulate the blood returning to the heart from the body and lungs, causing fluid (mainly water) to leak from capillary blood vessels. This leads to the symptoms that may include shortness of breath, weakness, and swelling.

Understanding blood flow in the heart and body

The right side of the heart pumps blood to the lungs while the left side pumps blood to the rest of the body. Blood from the body enters the right atrium though the vena cava. It then flows into the right ventricle where it is pumped to the lungs through the pulmonary artery. In the lungs, oxygen is loaded onto red blood cells and returns to the left atrium of the heart via the pulmonary artery. Blood then flows into the left ventricle where it is pumped to the organs and tissues of the body. Oxygen is downloaded from red blood cells while carbon dioxide, a waste product of metabolism, is added to be removed in the lungs. Blood then returns to the right atrium to start the cycle again.

Picture of a cross section of the heart.
Picture of a cross section of the heart.

Left heart failure occurs when the left ventricle cannot pump blood to the body and fluid backs up and leaks into the lungs causing shortness of breath. Right heart failure occurs when the right ventricle cannot adequately pump blood to the lungs. Blood and fluid may back up in the veins that deliver blood to the heart. This can cause fluid to leak into tissues and organs.

It is important to know that both sides of the heart may fail to function adequately at the same time and this is called biventricular heart failure. This often occurs since the most common cause of right heart failure is left heart failure. Continue Reading

Reviewed on 5/19/2016
References
REFERENCES:

Roger, Veronique L., et al. on behalf of the American Heart Association Statistics Committee and Stroke Statistics Subcommittee. "Heart disease and stroke statistics -- 2011 update: a report from the American Heart Association." Circulation 123.4 (2011): e18-e209.

Ho, K. K., et al. "The epidemiology of heart failure: the Framingham Study." Journal of the American College of Cardiology 22.4 Suppl A (1993): 6A-13A.

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