Sporty Jemma Rozier ( pictured ) was found slumped in the driver 's seat of her car after suffering a heart attack while driving to a party on March 14 . A sporty 28-year-old woman with an existing heart condition died after suffering a fatal heart attack at the wheel of her car while driving to a party . Jemma Rozier , 28 , from Swindon Village in Gloucestershire , was found slumped in the driver 's seat of her car at a junction . Paramedics were called and she was taken to hospital but doctors were unable to save her . Her heartbroken mother Clare , 49 , said : 'It should n't be this way round . Devastation is the first thing that hits you . 'We were talking about her finding a husband and having children . 'She was just a normal 28-year-old living her life . ' Tragedy struck after Ms Rozier left her family home and headed to a party at around 8.45pm on March 14 . She was found unconscious in her car just a few miles away by a passer-by who dialled 999 . Ms Rozier , who worked at Capita Insurance in Bishop 's Cleeve , was taken to Gloucestershire Royal Hospital where doctors could not save her . The keen sportswoman had a 'floppy valve ' due to a heart condition but lived an active life and had shown no signs of ill health before the incident . She was a Brownie leader in Guiting Power , a keen cyclist and had recently taken up salsa dancing . Her mother added : 'She 'd had regular check-ups and everything was fine . 'She was fun-loving . She was very keen on fitness . She cycled everywhere and went running with me . We 're all runners in the family . ' I do n't think many people probably knew about her heart condition , because it did n't restrict her . 'Never once was it a problem for her . It was a complete shock . ' Ms Rozier was a Brownie leader in Guiting Power , a keen cyclist and had recently taken up salsa dancing . Her father Edward , 54 , said : 'It was all so surreal until we went through and saw Jemma . We went through the motions but it just did n't seem real . ' Jemma leaves behind her younger sister , Natalie , 25 , who recently returned from a 13-month trip around Australia , New Zealand and America . Natalie , a fitness instructor , said : 'She meant the world to me . We were best friends as well as sisters . ' Jemma 's funeral takes place 2.30pm Friday March 27 at St Michael 's Church in Guiting Power . Ms Rozier was taken to Gloucestershire Royal Hospital where doctors battled in vain to save her . The mitral valve separates the upper left heart chamber from the lower left heart chamber , and helps control blood flow through the heart . During each heartbeat the smaller upper chambers of the heart contract to push blood into the larger lower chambers . The mitral valve opens to allow this passage of blood from the left atrium , and closes when the left ventricle is full of blood , to prevent backflow . When the valve closes , its two leaflets ( flaps ) normally seal the valve shut . Tendons attached to these flaps keep them taut and prevent them collapsing through to the other side . Problems with the mitral valve can make the heart less efficient at pumping blood around the body . Severe problems can lead to heart failure - which is where the heart can no longer pump enough blood around the body if the valve is not surgically repaired or replaced . There are three main types of problem : . - Mitral regurgitation ( also called 'mitral incompetence ' ) – where there is a backflow of blood through the valve , often as a result of a problem called mitral valve prolapse . - Mitral stenosis – where the valve does n't open as wide as it should , restricting blood flow . - Mitral valve prolapse - where one or more of the mitral flaps are floppy and do n't close tightly , often leading to backflow of blood . These conditions can each occur alone or in combination . Source : NHS conditions .
Jemma Rozier , 28 , suffered a fatal heart attack while driving to a party . She had a heart condition relating to her heart valves but lived an active life . Fitness fanatic Jemma was found unconscious in her car on March 14 . She was rushed to hospital but despite the best efforts of medics she died . Her devastated family have paid tribute to their 'fun loving best friend '