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  • adenosine
  • Ways to distinguish the three are: Vagal maneuvers (such as carotid sinus massage or Valsalva's maneuver) to slow the rate and identification of P waves administer AV blockers (e.g., adenosine, verapamil) to identify atrial flutter with 2:1 block Rate: Greater than or equal to 100. (wikipedia.org)
  • interval
  • P waves: Upright, consistent, and normal in morphology (if no atrial disease) P-R interval: Between 0.12-0.20 seconds and shortens with increasing heart rate QRS complex: Less than 0.12 seconds, consistent, and normal in morphology. (wikipedia.org)
  • rate
  • Usually in women with no heart problems, this syndrome is characterized by normal resting heart rate but exaggerated postural sinus tachycardia with or without orthostatic hypotension. (wikipedia.org)
  • normal
  • Sinus tachycardia is usually a response to normal physiological situations, such as exercise and an increased sympathetic tone with increased catecholamine release-stress, fright, flight, anger. (wikipedia.org)
  • blood
  • Tachycardia in the presence of AMI can reduce coronary blood flow and increase myocardial oxygen demand, aggravating the situation. (wikipedia.org)