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

Author Question: In second-degree AV block type I, the PR interval _____. a. shortens b. is absent c. is ... (Read 131 times)

eruditmonkey@yahoo.com

  • Hero Member
  • *****
  • Posts: 546
In second-degree AV block type I, the PR interval _____.
 
  a. shortens
  b. is absent
  c. is inconstant
  d. remains constant

Question 2

A line between waveforms is called a(n) _____.
 
  Fill in the blanks with correct word



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fwbard

  • Sr. Member
  • ****
  • Posts: 325
Answer to Question 1

C
In second-degree AV block type I, the PR interval is inconstant and the PR interval after a nonconducted P wave is shorter than the interval preceding the nonconducted beat.
Although progressive lengthening is a phrase that was used for many years to describe the behavior of the PR intervals associated with second-degree AV block type I, use of this terminology is no longer recommended; rather, the term inconstant or generally progressive PR intervals is recommended. Use of the term inconstant or generally progressive PR intervals is important because many type I AV blocks are atypical, missing one or more of the features of the classic Wenckebach phenomenon. For example, the second conducted PR interval after a blocked impulse may fail to show the greatest increase in length; instead, the PR interval may actually shorten and then lengthen in the middle of a grouped beating pattern. Alternately, the duration of the PR intervals may show no obvious change in the middle or for a few beats just before the end of a group.

Answer to Question 2

segment




eruditmonkey@yahoo.com

  • Member
  • Posts: 546
Reply 2 on: Jun 25, 2018
YES! Correct, THANKS for helping me on my review


nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

For a complete list of videos, visit our video library