This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The PR interval viewed on a normal electrocardiogram represents: a. atrial depolarization. b. ... (Read 92 times)

SGallaher96

  • Hero Member
  • *****
  • Posts: 509
on: Jun 25, 2018
The PR interval viewed on a normal electrocardiogram represents:
 
  a. atrial depolarization.
  b. ventricular depolarization.
  c. onset of atrial activation to onset of ven-tricular activity.
  d. electrical systole of the ventricles.

Question 2

A 13-year-old took a weight loss drug that activated the sympathetic nervous system. Which of the following assessment findings would the nurse expect?
 
  a. Decreased myocardial contraction
  b. Decreased heart rate
  c. Increased cardiac conduction
  d. Increased intranodal conduction time


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bd5255

  • Sr. Member
  • ****
  • Posts: 386
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: C
The PR interval represents the onset of atrial activation to the onset of ventricular activity. The P wave represents atrial depolarization. The QRS complex represents ventricular depolarization. The QT interval represents electrical systole of the ventricles.

Answer to Question 2

ANS: C
Stimulation of the SA node by the sympathetic nervous system rapidly increases cardiac conduc-tion. Stimulation of the sympathetic nervous system would increase myocardial contraction and heart rate. Such simulation would not affect conduction time within the node. These are inherent rates.


SGallaher96

  • Hero Member
  • *****
  • Posts: 509
Reply #2 on: Jun 25, 2018
Correct answers!


bd5255

  • Sr. Member
  • ****
  • Posts: 386
Reply #3 on: Jun 25, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Jugular Venous Pulse Waves in Relation to the Phonocardiogram and Electrocardiogram Jugular Venous Pulse Waves in Relation to the Phonocardiogram and Electrocardiogram
Pediatric Vital Signs Normal Ranges Pediatric Vital Signs Normal Ranges
An oscillating needle 1 or 2 inches Hg below normal could indicate an incorrect air–fuel mixture ... An oscillating needle 1 or 2 inches Hg below normal could indicate an incorrect air–fuel mixture ...
How did you give birth? C section vs. Normal Delivery How did you give birth? C section vs. Normal Delivery
Atrial flutter Atrial flutter
Normal rainfall has a concentration of OH- that is 3.99 × 10-9. The concentration of H3O+ in ... Normal rainfall has a concentration of OH- that is 3.99 × 10-9. The concentration of H3O+ in ...
Video: Introduction to Autism

For a complete list of videos, visit our video library