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Muncy unit 5 cdp utilize media and material

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Discussion of calcium channel blockers to treat cardiac dysrhythmias

Discussion of calcium channel blockers to treat cardiac dysrhythmias

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  • 1. Use of Diltiazem in Treatment of Supraventricular Tachycardia NUR 236 Group assignment 1
  • 2. Objectives• Upon completion of this presentation the learner will be able to: – State the effects of calcium channel blockers on the heart and blood vessels – Name the two calcium channel blockers that are used as antidysrhythmics – Name three adverse effects for which the nurse should monitor the patient receiving IV diltiazem
  • 3. Calcium Channel Blockers (CCBs)• Prevent calcium from entering cells• Used to treat: – High blood pressure – Angina – Cardiac dysrhythmias
  • 4. Antidysrhythmics• Most calcium channel blockers only act on blood vessels• Two CCBs act on the heart• Useful as antidysrhythmics – Verapamil – Diltiazem
  • 5. Action of Calcium & CCBs• Calcium regulates vascular smooth muscle contraction• CCBs cause vasodilation – Lowers blood pressure – Improves coronary blood flow
  • 6. Action of Calcium & CCBs• Calcium increases forcefulness of myocardial contractions• CCBs decrease myocardial contractility – Improves anginal pain
  • 7. Action of Calcium & CCBs• Calcium increases discharge from SA node• CCBs slow heart rate
  • 8. Actions of Calcium• Calcium increases conduction across AV node• CCBs slow conduction between atria and ventricles
  • 9. Adverse Effects of CCBs• Heart failure – Assess for signs frequently
  • 10. Adverse Effects of CCBs• Bradycardia – Continuous cardiac monitor
  • 11. Adverse Effects of CCBs• Hypotension – Monitor BP every hour
  • 12. ReferencesBlood pressure monitor image (nd). Retrieved June 24, 2011 from http://www.flickr.com/photos/zeusandhera/408799829/size s/s/in/photostream/Cardiac monitor image (nd). Retrieved June 24, 2011 from http://www.flickr.com/photos/brykmantra/76765412/sizes/s /in/photostream/Heart failure graphic (2008). Retrieved June 24, 2011 from http://commons.wikimedia.org/wiki/File:Heartfailure.jpg