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Author Question: Which of the following are possible causes of sinus tachycardia? a. Hypothermia, hypovolemia b. ... (Read 71 times)

Garrulous

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on: Jun 25, 2018
Which of the following are possible causes of sinus tachycardia?
 
  a. Hypothermia, hypovolemia
  b. Hypoxia, calcium channel blocker overdose
  c. Fever, pain, anxiety
  d. Vomiting, vagal maneuvers

Question 2

An ECG rhythm strip shows a ventricular rate of 128 bpm, a regular rhythm, a PR interval of 0.16 seconds, a QRS duration of 0.08 seconds, and one upright P wave before each QRS. This rhythm is sinus _____.
 
  a. arrhythmia
  b. bradycardia
  c. rhythm
  d. tachycardia


frogdreck123456

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Reply #1 on: Jun 25, 2018
Answer to Question 1

C
Causes of sinus tachycardia include: acute myocardial infarction; caffeine-containing beverages; dehydration, hypovolemia; drugs such as cocaine, amphetamines, ecstasy, cannabis; exercise; fear and anxiety; fever; heart failure; hyperthyroidism; hypoxia; infection; medications such as epinephrine, atropine, and dopamine; nicotine; pain; pulmonary embolism; shock; sympathetic stimulation.

Answer to Question 2

D
The rhythm described fits the ECG criteria for a sinus tachycardia.


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An ECG strip showing a normal sinus rhythm with the P wave, QRS complex, and T wave identified. An ECG strip showing a normal sinus rhythm with the P wave, QRS complex, and T wave identified.
Coronary sinus Coronary sinus
Carotid Sinus Carotid Sinus
Carotid Sinus Carotid Sinus
Detection of Hypovolemia by the Kidney and the Renin–Angiotensin System Detection of Hypovolemia by the Kidney and the Renin–Angiotensin System
Sinus tachycardia. Sinus tachycardia.
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