Which statement best compares an echocardiogram and a Doppler flow study? A. Both are used to evaluate chemicals produced by the heart.
B. Both involve the removal and testing of heart tissue.
C. Both utilize sounds waves to produce images of the heart.
D. Both require doctors to analyze electrical impulses produced by the heart.

Arrange the stages in problem sequentially 1. defining the problem 2. evaluating information 3. takin action 4. gathering information

Adouble-blinded trial for a new indication is conducted under an ind comparing two (2) marketed drugs, at twice the approved prescribed doses. on day 2, subject 603 had difficulty breathing. although it was life-threatening initially, subject 603 was treated and discharged directly from the emergency department after complete recovery. on day 5, subject 20 had a headache, which led to hospitalization and required blood pressure lowering medications. these episodes cannot be explained on the basis of the pharmacological property of either drug or the subjects' medical histories. the investigator would submit an sae report for

Which is shown to be an effective treatment for depression?