Final Answer:
The diagnosis for the 42-year-old stockbroker with a known heart murmur of 10 years duration experiencing increasingly severe shortness of breath (SOB) and fatigue, along with a severe mitral valve regurgitation revealed by an echo, is Mitral Valve Prolapse (MVP). The recommended treatment includes close monitoring, lifestyle modifications, and, if necessary, surgical intervention such as mitral valve repair or replacement.
Step-by-step explanation:
Mitral Valve Prolapse (MVP) is a condition where the valve between the left atrium and left ventricle of the heart doesn't close properly, causing blood to flow backward into the atrium. This regurgitation can lead to symptoms like shortness of breath and fatigue, as seen in the stockbroker. The duration of the known heart murmur and the severe mitral valve regurgitation on the echo support the diagnosis.
Management of MVP involves regular monitoring, especially if symptoms worsen. Lifestyle modifications, such as avoiding stimulants like caffeine and managing stress, are crucial in mitigating symptoms. In cases of severe regurgitation, surgical intervention may be recommended. Mitral valve repair or replacement aims to restore normal valve function and prevent further complications.
In summary, the combination of the patient's symptoms, known history of a heart murmur, and the findings on the echo point towards Mitral Valve Prolapse as the likely diagnosis. The treatment approach includes a combination of close monitoring, lifestyle adjustments, and potential surgical intervention for severe cases.