Various other special tests may be necessary:

1) chest x-rays (CXR);

2) electrocardiogram (EKG); 3) echocardiogram;

4) Doppler echocardiogram;

5) stress exercise testing, including nuclear and echocardiographic;

6) 24 hour Holter tape recordings;

7) magnetic resonance imaging (MRI);

8) computed tomography (CT);

9) cardiac catheterization;

10) electrophysiology heart study;

11) coronary angiogram;

12) genetic testing.