How does it come about???????

An article Delling and Vasan well explains mitral valve prolapse (MVP) and just where it comes from. They state to diagnose the condition it requires a, "physical examination and a 2-dimensional echocardiogram.

The picture provided by the echocardiogram shows the healthcare team the mitral valve of the heart and if the leaflets are ballooning back into the atrium. A non-statistically significant link believes that MVP is more prone in females than in males. According to the Medscape website MVP is the most common valvular abnormality, affecting 2-6% of the population  of the United States. 

Additionally, the Women's Heart Foundation reports that MVP is the most common of the heart valve conditions and that it affect 6% of all women.

References

1. Delling FN, 
2. Vasan RS

. Epidemiology and pathophysiology of mitral valve prolapse: new insights into                                          disease progression, genetics, and molecular                                                                                             basis. Circulation.2014;129(21):2158–2170pmid:24867995

http://emedicine.medscape.com/article/155494-overview

http://www.womensheart.org/content/heartdisease/mitral_valve_prolapse.asp