/* Discovernator - full and tiny */ .discovernator #factContainer { margin: 0 70px; -moz-box-shadow: 0 0 5px #a3ccea; -webkit-box-shadow: 0 0 5px #a3ccea; box-shadow: 0 0 5px #a3ccea; } .discovernator .tri { position: relative; z-index: 3; } /* full*/ .mainDiscovernator .RandomFact.module { margin-bottom: 0; } .discovernator.full { width: 825px; height: 570px; padding: 0 0 38px 0; background: url('http://static.howstuffworks.com/gif/heart-health-tips-background.png') no-repeat 0 0; } .discovernator.full h1 { width:515px; height:122px; background: url('http://static.howstuffworks.com/gif/heart-health-tips-big-title.png') no-repeat 130px 15px; } .discovernator.full h2 { width:498px; height:23px; background:url('http://static.howstuffworks.com/gif/heart-health-tips-subheading.png') no-repeat 50px 0px; } .discovernator.full .button { width:233px; height:51px; background: url('http://static.howstuffworks.com/gif/heart-health-tips-button.png') no-repeat 0 0; } .discovernator.full .tri { background-image: url (data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEYAAAAlCAMAAADIkG9CAAAAulBMVEX////8/f72+v37/f7P5vP0+f2x1+zO5fOy2O3w9/u12e7y +Py83e/g7/j9/f74/P3l8Pi/3u/m8vjb7Pbe7ffF4PHE4PDL4/Pa7Pay1+3T5/Tt9fv9/v7W6vXM5fO02O293e/u9vuz2O3F4fHr9fr4+/3n8vnq9Pr +/v/Y6/X0+fz6/P3d7ffG4vG+3e/V6fXj8Pi52u7X6vXK4/K42u7B3/Dz +fzl8fjv9vvJ4/Lo8/nA3vC72+6w1uxDqvEIAAAAPnRSTlP//////////////////////////////////////////////////////////////////////////// /////ALr7cTYAAAEjSURBVEjHrdRndoJAFIbhQZEWiIDdaDSa3nt/97+t/OEkEgemyLeA58wtcwW/aQvr7IkmmHa8wbSsmRFNMD2aYFJKTNdOOZ6UGbsWHy0oM4 6NcrCizARWFQX8Yx4slLxQNpjMatJbzNoU2XeRMK6hcpkhY8Zmyv0KKfNmgjguyJl3k8MQU8F4+ts36wVUMUv9xV1CJaM7qK4PNUxfT0kW1DKh1nf +glomOlcj4Q0omEP1kEegZFIF0vFBzXhX9eX4HjrMRx3yOUCVgjmtPgdJDJpMNKtqyTwCbWYqf0g6QDMCwOvIBjyNwIjZXprWOMMkAuC1bJz0hxhGAE +ld1yvMY+AyV9nwotbrCJgXhyS3H/GNoJvRwjn7PGFXSJI8rshu+YHsJQatMLGNKcAAAAASUVORK5CYII=); } /* tiny*/ .discovernator.tiny { height: 304px !important; background: url('http://static.howstuffworks.com/gif/families-background-mini.jpg') no-repeat 0 0; } .discovernator.tiny h1 { margin: -8px -13px 0; width:300px; height: 82px; background: url('http://static.howstuffworks.com/gif/families-header-mini.png') no-repeat 0 0; } .discovernator.tiny h2 { margin: 6px auto 0; width:192px; height:30px; background: url('http://static.howstuffworks.com/gif/families-tagline-mini.png') no-repeat 0 0; } .discovernator.tiny #factContainer{ margin: -14px auto 0; height: 105px; } .discovernator.tiny #justthefacts li { padding: 16px 12px; height: 85px; } .discovernator.tiny #gimme { margin: 20px auto; } .discovernator.tiny .button { width:144px; height:31px; background: url('http://static.howstuffworks.com/gif/families-more-button-mini.png') no-repeat 0 0; } .discovernator.tiny .tri { background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACcAAAAVCAMAAADyzwehAAAAw1BMVEX/// +12O39/f7U6PT9/v7k8fiy1+zE4fH8/f7f7vjv9vvH4vLW6fX4/P34+/3E4PG52+6x1+zO5fO93O7L4/Oy2O3R5/P+/v/f7vf9/v/x +Pzh8Pjv9vv3+/3F4fG32u6z2O2x1uy42u7A3u/Y6/XY6vX1+v3b7Pbo8/nm8vjc7PfM5PP6/f79/v7T6PTt9frg7/jW6vW72+7n8/m62+70+f283e/j8Pjv9/v a7Pbm8vnu9fvE4PDQ5/PG4vHA3vCw1uzLlOswAAAAQXRSTlP/////////////////////////////////////////////////////////////////////////// //////////ADBV7McAAAC2SURBVCjPhc/XDoJAFEXRQUMLKMWu2HvB3uv5/68yCEHKDLOfV27OJYLXlHA6EXjpHJYzfLfjOBu +G2WzPAJ347HAqVnbqgidyGZtDaGTNkw2M/F3woSh3LGFiCs16MzpAFG3pKpCvoK4W9DebO2BuJMe6WHiB0i6kpJUcwNIu3VilzoEKK7vRFVTNwGqk2shKl7eEs BwhwCt7vYArAie7u+S+DoiI9K7EsWpa11kR+Rt+WyB2xegSVyWUNqfMQAAAABJRU5ErkJggg==); } /* twitter button*/ #twitternator i { background: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC0AAAAoCAYAAABq13MpAAAGH0lEQVRYw +2Y30+TVxjHOTHOkUFCll0sXnFBNFmyhERvZrzo5S7J/APozW6WKU5BJz8LFkqopSDQX5ZSoFSkQPnpmNOBFGEotLQVms4RKlWrMClNxSb24ux53vZl/fECrh0/ sknyzVva857zeb/neZ7znpNCKU3ZSeScjEfy5Pz3aZusSJ4ih1xQGxnlKXhcbf5ufLYxO74DeQYpaLGQQj39pm1UkjTQ2SYeKHvL3y/c4JHiLkqEQ/TTmtveE9e HxdtCp15pW2AAzys3HU0r0VeRqp8ouTZKPxIOviEXm3OSgT5RNygmVzooKdBGjcPq4/Lu50Ryn5KmR5TUPWDgoW3LltBnuqbtRDRCSVkvNhwl +ZrMI5VDG6RhmhK5mRLpOD0s6PHDYBmJQj9+tZ57XGXyk+o7lAiMlPzY7iU/qASMy5da+aTmbmgspZUShYWS65MsuIATWmd/JmIaoQD +UOWwj9SOw81zlKhsoc6u/UpTyww6mEZjguBpjJOyGUoafmP6IxX9lBTdtHwiGn5Jrk +FgHE8lHKO4TkiHNhgHuz7hgwI48zIDrNO6ue8TEOm07DDbAconDYcSIDMibktefTUka6eC4bcnAvBozn1kyF3I8dDYRt80FIDPXRJa200PT4W1aHW/txAZLPhp 7RydGChuXeeuBdW/VOJQps962fSFA/fbfaPVzSKEceY7CxLTfQrzYTrS0nfKcbyiE6zc0ecbqYDjpvTVbPBP7wb +dDu8yQSMu27X5zOo632wJaQHGb1Lb62LPveYjXJSkktaNaR81Ab8+SZ5HIb7wv1pHXT7Zgbb9hePMJB/4V6zP/27hM7ZzjECgzMGXB40FB27JSlNb/gs8peMyn qpKQcMloyFhfL6c3WoGT2mQNuOP3Pa3NjNiiu4vy8uJJ/VGPe0W2cXdPyWnVs9UB6qeShy3FcO +Nnki0cHukaWzDn9hPP4z/f3IM2XyfoatbhgpZxWOGkuMLBjPLIRTU/VTjwgKlU20Bjwo65vfdjwzGyc4S6ARqN0CDocpIxnPLM91Z2UnlvCisAIyxz4nuhasQF Dd8d1doCYeCsLReXXRbO5uW+319ZTnaYvUyZYxeRGNjj+nm/xPwCQ/EmF/BeQm9WJwzFlbfvTFgNzt13LZ0bf7qEV83Cin3h9cZUeLa3DcW9ho50Hh +AH6HT7xuG+wWdlD5Af4D+X0IXFxfzSkpK +AcOuqioKG7vBqAZQqHQUlNTQ7u7uyUHDrq6unoBAcvKyjYdFYvFVXK5nGo0GtrU1PSmoqIi50BBDw0N2RUKBa2rq6MAP3r16tVMmUy2odfrqcFgoK2trbS +vt4PD5VxYKCdTqdIp9NRlFKppADs02q1GBa0t7eXAUfHpVKpTiAQGA9KImYNDw97e3p66K1btyjrMAKz6uzsZMDBcbpbQKWlpTnl5eVGFHzm7Vg9wG1DV1cXA4 jwkcCs25OTk+61tbWE9ohYhUBbHtbADPIkEgnmD1WpVN6Wlhbuw5rCwsKoPeLExISbCxgFoRL0+XwJ7xHVarUYEp7GJjwryKfnGJI4o +3t7Qw8tI0/rIEvdTglUN4yq6qqeOCmlXU71mWYiaT2iKurq7kQen5wkQkxkUjkBXeZgxgYmw8PxYyDpuEV8ysMHn1Ys76+LmhsbDRDeWM6gimJi2Wj0Ricn59P aI8Y +0qKTrI5g/nR0NBAYWwLlNaXHR0dUWGJn8PgzGENRgWsJ5mbe0Sbzebo6+vzY4fsjf39/UGTyeTxer3J7BGjZLfbHWgCjoGVCeHxQRAu1qxwSDK/19bW0srKSuv 09PSxPdkjRmplZeUMhN871hi8Roorl/Bh2tra8OqCcnxqX3YtUIGcg4ODga0guaCXl5ctfr8/dFizTwsEH8DtXOEQK3ywsbGx6MOa3QbEFzFQ3NIPzuVDbO/oNv we9Hg81Xv9Pp0FJWscVjgprnBQWnnw4sWHivUAk287aExYAN72sGbXBLEog3I2hRUAhWWuubmZRlaq2JAYGBgIhIH397DG5XJZIAG97HtNLDD +PzIy4nfA34E7rAkEAia3222ZmZlZmp2dXcLr4uKiHRa6/+5hzV9kwTJynia+aQAAAABJRU5ErkJggg==") no-repeat -24px 0; height: 18px; width: 20px; margin-left: 8px; }
Like HowStuffWorks on Facebook!

Jugular Venous Distension

        Health | Heart

The jugular vein runs up the side of your neck.
The jugular vein runs up the side of your neck.
Klaus Tiedge/Blend Images/Getty Images

The phrase "go for the jugular" means to attack a vital, vulnerable part of someone or something. It refers to the jugular vein, which runs on both sides of the neck of a person or animal and returns blood from the head to the heart. Serious injury to the jugular can drain blood from the head and brain and lead to a quick death.

For patients with heart disease, cardiologists now often go to the jugular for help in making diagnosis and treatment decisions.

Conventional wisdom has long linked swollen neck veins with the occurrence of heart disease. Nowadays, some cardiologists evaluate blood pressure in the jugular as a part of their physical exams of heart patients and use this information to make their diagnoses. When the blood pressure in the jugular vein is higher than normal, its walls can swell or distend, resulting in a condition known as jugular venous distension.

Cardiologists can estimate the blood pressure in the jugular vein (jugular venous pressure) by careful observation of the vein. This requires the patient to be lying down with the upper body at an angle of less than 30 degrees, with the neck muscles relaxed. The doctor usually observes the jugular vein from the side, aided by a beam of light shining on the patient's neck. From this perspective, he or she can observe the filling level of the jugular and estimate the blood pressure.

Cardiologists can also observe pulses in the jugular vein, called the jugular venous pulse. This is a source of information about the state of the right atrium, one of the chambers in the heart.

Analysis of jugular venous pressure and pulse provides information about physical aspects of the blood circulation in the right side of the heart and can be useful in the diagnosis of different forms of heart and lung disease. An elevated jugular venous pressure is the classic sign of right-sided heart failure.

On the next page, we'll find out what causes jugular venous distension and how it can result in fluid overload.