Answer 41

41.  Choice C is the correct answer.  EKG changes associated with a pulmonary embolus are as follows:  Lead I large S wave, Lead II ST depression, Lead III a Q wave with an inverted T wave.  There is typically T wave inversion in leads V1-V4.  There may also be a right bundle branch block present.  Pericarditis would typically have diffuse ST elevation.  Hyperkalemia will have peaked T waves and hypercalcemia causes the QT interval to be shortened.