Top 5 Things You Should Know (But Don't) about Mitral Valve Prolapse

        Health | Heart

Trust us -- you don't want a leaky heart. See more heart health pictures.
Mike Kemp/Getty Images

­Your heart has four chambers: two upper chambers called atria, where blood enters the heart, and two lower chambers called ventricles, where blood leaves the heart. It also has a total of four valves -- two entryways between each atrium and ventricle, and two exit valves between the ventricles and the outside of the heart. These valves are small muscular rings that have small leaflets attached. When closed, these leaflets fit tightly together, preventing the flow of blood. When pressure builds behind the valves, they open, allowing blood to pass. The valves are one-way doorways, forcing blood in one direction so that it doesn't leak backward after passing through a valve.

The mitral valve, in the left side of your heart, is the exit gate leading out of your lower ventricle. (The mitral valve is also known as the bicuspid valve, because unlike the other valves, the mitral valve only has two leaflets, instead of three.) In this article, we'll look at a condition called mitral valve prolapse (MVP), which is when the mitral valve closes but the leaflets billow backward into the upper atrium. Mitral valve prolapse can cause mitral valve regurgitation, which is when your blood leaks through a poorly closed valve. In this case, some of the blood that's already passed from the atrium to the ventricle leaks back into the atrium. And that's not good.

There are five things you need to know about MVP, and the first one is on the very next page.


/* 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; }