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November 20, 2009
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Hoarseness

Medical Author: Steven E. Doerr, MD
Medical Editor: William C. Shiel Jr., MD, FACP, FACR

What is hoarseness?

Hoarseness is an abnormal deep, harsh voice caused by a variety of conditions.

What causes hoarseness?

Hoarseness is generally caused by irritation of, or injury to, the vocal cords. The larynx (also referred to as the voice box), is the portion of the respiratory (breathing) tract containing the vocal cords. The cartilaginous outer wall of the larynx is commonly referred to as the "Adams apple." The vocal cords are two bands of muscle that form a "V" inside the larynx. When we sing or speak, the vocal cords vibrate and produce sound.

Picture of the Larynx

Hoarseness can be caused by a number of conditions. The most common cause of hoarseness is acute laryngitis (inflammation of the vocal cords) caused by an upper respiratory tract infection (usually viral), and less commonly from overuse or misuse of the voice (such as from yelling or singing).

Other causes of hoarseness include:



Next: What are the signs and symptoms of hoarseness? »

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Hoarseness

Introduction

The superior vena cava is a large vein located in the upper chest, which collects blood from the head and arms and delivers it back to the right atrium of the heart. If this vein is compressed by outside structures, or if a thrombus or clot develops within it, then return blood flow to the heart is impeded. When blood flow to the heart is restricted, the increased pressure in the veins of the face and arms causes edema (fluid buildup) in these areas. This condition is referred to as superior vena cava syndrome.

Because the superior vena cava, like all veins, has a thin wall (there are no muscles in the walls of a vein as compared to the walls of an artery), and because there is little pressure inside the vein, it can be easily compressed by outside structures. The superior vena cava lies next to the upper lobe of the right lung and within the mediastinum [the space that contains the central structures of the chest: the heart, the ...

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