Author Question: The patient has had a myocardial infarction. The nurse realizes the significance of this injury is ... (Read 18 times)

theo · **on:** Jul 23, 2018

The patient has had a myocardial infarction. The nurse realizes the significance of this injury is damage to what layer of the heart?

A) Endocardium
B) Pericardium
C) Myocardium
D) Epicardium

Question 2

The pharmacology instructor explains to students that adverse effects can be extensions of what?

A) Primary action of a drug
B) Anaphylaxis
C) Secondary action of a drug
D) Anticholinergic responses to the drug

thall411 · **Reply #1 on:** Jul 23, 2018

Answer to Question 1

C
Feedback:
The fibers of the cardiac muscle, or myocardium, form two intertwining networks called the atrial and ventricular syncytia. A myocardial infarction impacts this layer, which results in reduced pumping ability. The endocardium is the inner lining of the heart that comes in contact with the blood. The pericardium is the sac around the heart. The epicardium is the outermost layer of the heart.

Answer to Question 2

A
Feedback:
Primary action adverse effects are extensions of the therapeutic action and are usually the result of overdosage, essentially too much of the therapeutic effect. Anaphylaxis is not an extension of the therapeutic action of the drug but a histamine reaction to an allergen. Secondary actions of a drug are negative effects of the drug that occur even when the drug is in the therapeutic range. Anticholinergic responses occur in response to drugs that block the parasympathetic nervous system.