Infection: Viral most common--> Coxsackie, HSV, HIV; Bacterial (extension from pneumonia); TB (miliary or extension from pneumonia), Acute Rheumatic Fever
May be tachycardic - depending on degree pain/inflammation; also if effusion, depressed ventricular function
Pericardial friction rub (three components)
If effusion, may have decreased heart sounds
If tamponade, elevated jvp, soft heart sounds, elevated hr, low bp, pulsus paradoxus (more then 10 point difference between SBP on expiration v inspiration), sometime palpable pulse volume varies