Diagnostics: Jugular Vein Occlusion

Testing for Venous Hum as a cause for pulsatile tinnitus

A venous hum is one specific cause of pulsatile tinnitus. This page describes the jugular occlusion test, a simple office maneuver used to help identify a venous hum as the source of the sound.

What Is Pulsatile Tinnitus?

Pulsatile tinnitus is the perception of a rhythmic sound in one or both ears that keeps time with the heartbeat. Unlike steady ringing, a pulsatile sound throbs, whooshes, or hums in a pulse-like pattern, often signaling that the noise is produced by blood flow through a vessel located near the ear.

What Is a Venous Hum?

A venous hum is a soft, low-pitched humming or buzzing sound created by blood moving through the veins that drain the head and neck, including the sigmoid sinus, transverse sinus, jugular bulb, and internal jugular vein. These veins sit close to the hearing structures of the inner ear, so turbulence in blood flow through them can be transmitted to the ear and perceived as pulsatile tinnitus. Venous causes account for roughly one-third of pulsatile tinnitus cases.

Typical Features of a Venous Hum

• Low-pitched, described as a hum or buzz rather than a high-pitched whooshing or ringing

• Timed with the heartbeat

• Often changes with position or activity, becoming louder when lying down or after exertion

• Frequently affects one ear, though occasionally both

A higher-pitched whooshing or hissing sound points more often toward an artery-related cause, which is one reason the exact quality of the sound is a useful detail in an evaluation.

The Jugular Occlusion Test

The jugular occlusion test, also called the venous compression maneuver, is a simple, quick office test used to help determine whether a pulsatile sound in the ear originates from a vein. No special equipment is required.

How the test is performed:

• Gentle pressure is applied with the fingers over the jugular vein on the same side of the neck as the ear with the sound.

• Any change in the pulsatile sound is noted while pressure is applied.

• The pressure is then released.

How the result is interpreted:

• If the sound softens or disappears with gentle compression of the same-side jugular vein, a venous hum is likely, since reducing flow through that vein quiets the hum.

• If the sound becomes louder or does not change, a different source, such as an artery or another type of venous pathway, may be responsible, and further evaluation is used to clarify the cause.

Turning the head to one side, or a gentle bearing-down (Valsalva) effort, can produce similar changes and may be used alongside the jugular occlusion test.

What Follows a Positive Test

A positive jugular occlusion test is a helpful clue rather than a final diagnosis. When a venous cause is suspected, imaging of the blood vessels of the head and neck, such as CT venography, MR venography, or ultrasound, is typically used to look for the source and to identify specific, often treatable abnormalities. In selected cases, additional specialized venous testing helps confirm that an identified abnormality accounts for the symptom before any treatment is considered.

When Evaluation Is Especially Important

Pulsatile tinnitus generally warrants evaluation by a healthcare professional. Evaluation becomes especially important when the sound is accompanied by:

• Sudden or worsening hearing loss

• New or severe headaches, or headaches that change with position

• Vision changes

• Dizziness or balance problems

• A recent neck injury or neck manipulation

More information on tinnitus in general is available elsewhere on this site. This page is intended for general education; as noted in the disclaimer, it should not be considered medical care or a specific recommendation unless discussed with a personal physician.