Echocardiogram may show presence of fluid surrounding the heart in pericardial effusion. Loculated effusions secondary to adhesions in pericardial cavity may also be visualized as shown in the video below. 
Swinging motion of the heart may be seen in patients with cardiac tamponade.
Uremic pericarditis echocardiography
Tuberculous pericarditis electrocardiogram
Uremic pericarditis cardiac catheterization
Constrictive pericarditis CT scan
Constrictive pericarditis MRI
Tuberculous pericarditis MRI
Tuberculous pericarditis CT scan
HIV induced pericarditis laboratory studies