« previous next »

Author Question: What are the atrial and ventricular rates for lead I in the following electrocardiogram? Atrial Rate ... (Read 132 times)

captainjonesify

  • Hero Member
  • *****
  • Posts: 543
on: Jul 16, 2018
What are the atrial and ventricular rates for lead I in the following electrocardiogram? Atrial Rate Ventricular Rate
 
  a. 75 225 c. 300 75
  b. 180 90 d. 135 45

Question 2

The heart block that causes dropped beats and that is often the result of increased parasympa-thetic tone is called _____ block.
 
  a. Sinoatrial c. First-degree atrio-ventricular
  b. Mobitz type I d. Left bundle branch


Perkypinki

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: C
The strip is 2.4 seconds long, so 60  2.4 = 25, making 25 the multiplication factor. Because there are 3 ventricular beats, the ventricular rate is 3 times 25, or 75 beats/min. There are 12 P waves, making the atrial rate 12 times 25, or 300 beats/min.

Answer to Question 2

ANS: B
Dropped beats are characteristic of second-degree atrioventricular blocks, which consist of Mo-bitz type I and Mobitz type II blocks. These dropped beats are a result of the atrioventricular node's inability to conduct impulses from the sinoatrial node. Sinoatrial blocks are indicated by a sudden loss of P waves. First-degree atrioventricular blocks are indicated by a prolongation of the PR interval. Left bundle branch blocks are indicated by the absence of Q waves in the left limb leads.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Gunnar Kaasen and Balto, the lead dog on the last relay team of the 1925 serum run to Nome. Gunnar Kaasen and Balto, the lead dog on the last relay team of the 1925 serum run to Nome.
(a) Uranium series dating uses the decay chain of radioactive uranium to stable lead. (a) Uranium series dating uses the decay chain of radioactive uranium to stable lead.
The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p The world has been horrified recently at a U.S. Congress so polarized and paralyzed that it cannot p
Anxiety rises as needs are not met. Without resolution, anxiety may lead to frustration, and then, ... Anxiety rises as needs are not met. Without resolution, anxiety may lead to frustration, and then, ...
Factors Affecting the Environmental Lapse Rate (ELR): Heating or Cooling of the Lower Atmosphere Factors Affecting the Environmental Lapse Rate (ELR): Heating or Cooling of the Lower Atmosphere
Fertility, Mortality, and the Net Rate of Reproduction in Sweden Fertility, Mortality, and the Net Rate of Reproduction in Sweden
Video: A timeline of the teeth (Explained - No Audio)

For a complete list of videos, visit our video library