This topic contains a solution. Click here to go to the answer

Author Question: Poor R-wave progression is a phrase used to describe R waves that decrease in size from V1 to V4 . ... (Read 28 times)

danielfitts88

  • Hero Member
  • *****
  • Posts: 535
Poor R-wave progression is a phrase used to describe R waves that decrease in size from V1 to V4 . This is often seen in an _____ infarction.
 
  a. anteroseptal
  b. anterolateral
  c. inferolateral
  d. inferoposterior

Question 2

Thin strands of fibrous connective tissue extend from the atrioventricular (AV) valves to the papillary muscles and prevent the AV valves from bulging back into the atria during ventricular systole. These strands are called _____.
 
  a. cardiac cilia
  b. Purkinje fibers
  c. papillary muscles
  d. chordae tendineae



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Brenm

  • Sr. Member
  • ****
  • Posts: 359
Answer to Question 1

A
Poor R-wave progression is a phrase used to describe R waves that decrease in size from V1 to V4 . This is often seen in an anteroseptal infarction, but may be a normal variant in young persons, particularly in young women. Other causes of poor R-wave progression include left bundle branch block, left ventricular hypertrophy, and severe chronic obstructive pulmonary disease (particularly emphysema).

Answer to Question 2

D
Chordae tendineae are thin strands of connective tissue. On one end, they are attached to the underside of the AV valves. On the other end, they are attached to small mounds of myocardium called papillary muscles. Papillary muscles project inward from the lower portion of the ventricular walls. When the ventricles contract and relax, so do the papillary muscles. The papillary muscles adjust their tension on the chordae tendineae, preventing them from bulging too far into the atria.




danielfitts88

  • Member
  • Posts: 535
Reply 2 on: Jun 25, 2018
Excellent


brbarasa

  • Member
  • Posts: 308
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

For a complete list of videos, visit our video library