Congenital Document Pericarditis 
Dr. Smith's ECG Blog
OCTOBER 23, 2023
Echo studies in patients with documented cardiac tamponade confirm that electrical alternans is synchronous with and a direct result of the pendulous movement of the heart within the enlarged, fluid-filled pericardial sac of a patient with large pericardial effusion ( the "swinging heart" phenomenon ).
Dr. Smith's ECG Blog
NOVEMBER 28, 2022
The second most common cause of medical cardiac tamponade is acute idiopathic pericarditis. Less common etiologies include uremia, bacterial or tubercular pericarditis, chronic idiopathic pericarditis, hemorrhage, and other causes such as autoimmune diseases, radiation, myxedema, etc.
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