« previous next »

Author Question: What is implied by an abnormally prolonged PR interval? a. Atrioventricular block b. ... (Read 140 times)

rachel9

  • Sr. Member
  • ****
  • Posts: 495
on: Jul 16, 2018
What is implied by an abnormally prolonged PR interval?
 
  a. Atrioventricular block
  b. Bundle-branch block
  c. Myocardial infarction
  d. Valvular detachment

Question 2

What is the normal period of time for the PR interval?
 
  a. Not longer than 0.20 sec
  b. Not longer than 0.30 sec
  c. Not longer than 0.45 sec
  d. Not longer than 0.50 sec


Anonymous

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
PR intervals longer than 0.20 sec suggest that the impulse is abnormally delayed at the AV node and a block is present.

Answer to Question 2

ANS: A
Normally, the PR interval represents a period no longer than 0.20 sec.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Primates exhibit prolonged life histories, spending more time in each stage of life than most other Primates exhibit prolonged life histories, spending more time in each stage of life than most other
Implied Faces Implied Faces
Block Diagram of Single-stage Pressure System for Dual-Stage Pressure Production of Nitric Acid Block Diagram of Single-stage Pressure System for Dual-Stage Pressure Production of Nitric Acid
Sites of cholinergic antagonist actions. Muscarinic antagonists block cholinergic receptors in the ... Sites of cholinergic antagonist actions. Muscarinic antagonists block cholinergic receptors in the ...
Inhibition of cyclooxygenase 1 and 2. Nonselective NSAIDs block the cytoprotective effects as well ... Inhibition of cyclooxygenase 1 and 2. Nonselective NSAIDs block the cytoprotective effects as well ...
Coolant circulates through the water jackets in the engine block and cylinder head. Coolant circulates through the water jackets in the engine block and cylinder head.
Video: Carbohydrate digestion (brush border enzymes, end products) & Carb absorption (fructose, galactose)

For a complete list of videos, visit our video library