Perform an Internet search for chest radiographs showing the deep sulcus sign. Print out an image for your notes, or sketch a simple diagram

When a Q wave is equal to or greater than 0.04 seconds in width, it is termed a(n):

A) inverted Q wave B) pathologic Q wave C) universal Q wave D) depressed Q wave

A 97-year-old man became dizzy and fell onto the floor. You find him sitting on the floor with his wife next to him. His wife states that he did not lose consciousness and that this has happened several times over the past two days. Currently, the patient is alert and oriented and complaining of dizziness and a headache. He has a history of coronary artery disease, emphysema, and hypertension,

and states that he saw his doctor two days ago. Which one of the following questions would be most helpful in identifying the cause of this patient's signs and symptoms? A) "Have you ever had a stroke?" B) "Did the doctor prescribe any new medications?" C) "When was the last time you ate or drank anything?" D) "Why didn't you call 911 when he fell before?"