### Patient: Doctor, I have been experiencing fainting, dizziness, and shortness of breath lately. My heart rate also seems to be fluctuating between fast and slow. What could be the problem?
### Doctor: It is possible that you may be suffering from Sick Sinus Syndrome. To confirm the diagnosis, the required medical tests include an Electrocardiogram, Ultrasonography, Echocardiography, and a Lipid panel. Additionally, we may need to conduct a diagnostic cardiac catheterization, coronary arteriography, and a depression screening.