1. What is the role of echocardiography in the diagnosis of cardiac murmurs? 2. What is the prognosis in aortic valve disease, and who needs catheterization? 3. How do I evaluate mitral regurgitation in patients with left ventricular systolic dysfunction? 4. What is the course and prognosis of mitral valve prolapse? 5. What are the red flags that indicate early referral to a cardiologist?