all of which are seen in about 50% of cases of pericarditis. Stage I (acute phase): Diffuse concave upward ST segment elevation in most leads, PR depression in most leads (may be subtle), and ...

all of which are seen in about 50% of cases of pericarditis. Stage I (acute phase): Diffuse concave upward ST segment elevation in most leads, PR depression in most leads (may be subtle ...