The nurse would explain to a client that the isoenzyme most useful in the diagnosis of myocardial infarction is
a. CK-MB.
b. CK-MM
c. myoglobin.
d. troponin
D
The enzymes most often used to detect MI are myoglobin, creatine kinase, and troponin. Myog-lobin is released rapidly, but its short half-life makes it less useful in clients who present several hours after an infarction. CK-MB is specific for cardiac muscle. Troponin is as sensitive as CK-MB but is more specific and is more useful in excluding myocardial infarction when CK-MB is falsely elevated. CK-MM is a measure of skeletal muscle enzymes.
You might also like to view...
Once a child is intubated, which of the following is used to verify proper placement of the endotracheal tube?
A) Rise and fall of the chest B) Chest x-ray C) Tidal volume D) Absence of sternal retractions and/or grunting
A 22-year-old male college senior has lived with a diagnosis of Crohn's disease for several years and has undergone several courses of treatment with limited benefit
Which of the following targeted therapies has the potential to alleviate the symptoms of Crohn's disease? A) Tositumomab plus 131I (Bexxar) B) Muromonab-CD3 (Orthoclone OKT3) C) Infliximab (Remicade) D) Eculizumab (Soliris)
When performing a urinary catheterization on a female client, the nurse should insert the catheter:
a. 5 to 8 inches. b. 1 to 3 inches past the point when urine starts to flow. c. Until the hub of the catheter is at the meatus. d. Until resistance is felt.
A client with a mental disorder is being discharged from the inpatient unit
During the client's stay in the hospital, the client eventually was able to get an adequate night's sleep even though the client had experienced chronic insomnia over the years. The client's spouse asks the nurse what the family can do in the client's home environment to promote healthy sleep. Which response by the nurse would be most appropriate? A) "It is basically up to your husband to focus on promoting his own sleep." B) "You might consider a glass of wine about 30 minutes before he is ready to go to bed." C) "Remember to keep stimulating activities at a minimum before he goes to bed." D) "Give him a spicy snack with a warm cup of tea at night before bedtime."