Podcast 694: Complete Heart Block

Podcast 694: Complete Heart Block

Contributor: Nick Hatch, MD

Educational Pearls:

  • Complete heart block or 3rd degree atrioventricular (AV) block is diagnosed via EKG and occurs when electrical signals from the sinoatrial (SA) node are blocked from reaching the ventricles via the AV node and AV bundles
  • P waves and QRS complexes are independent
  • Often QRS rate is around 40
  • The rate is slow because the ventricular purkinje fibers have an intrinsic rate of 20-40 bpm, whereas the SA node has an intrinsic rate of 60-100 bpm
  • Treatment is usually with pacemaker, unless there is an identifiable etiology causing the heart block that can be reversed

References

Knabben V, Chhabra L, Slane M. Third-Degree Atrioventricular Block. [Updated 2020 Aug 8]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK545199/

The Emergency Medical Minute is excited to announce that we are now offering AMA PRA Category 1 credits™ via online course modules. To access these and for more information, visit our website at www.emergencymedicalminute.org/cme-courses/ and create an account.

Donate to EMM today!



Episoder(1145)

Podcast #278: Subdural Hematomas

Podcast #278: Subdural Hematomas

Educational Pearls Subdural hematomas can happen in the elderly because of brain atrophy, and can manifest with neurological deficit. Subdural hematomas are caused by rupture of the bridging veins of...

6 Des 20172min

Podcast #277: Mucor

Podcast #277: Mucor

Author: Don Stader, M.D. Educational Pearls Mucor/Rhizopus fungal infections usually present in diabetic or immunocompromised patients as a black, necrotic lesion on the face. The fungus invades the ...

4 Des 20172min

Podcast #276: Angioedema

Podcast #276: Angioedema

Author: John Winkler, M.D. Educational Pearls Angioedema is immediately life-threatening due to airway obstruction. Mechanisms include allergic reaction (histamine-related) or bradykinin-related (ACE...

1 Des 20173min

Podcast #275: Battery Ingestions

Podcast #275: Battery Ingestions

Author: Nick Hatch, M.D. Educational Pearls Unlike coin ingestions, button batteries can cause necrosis of the GI tract. If lodged in the esophagus, removal within 2 hours is important, because they ...

29 Nov 20174min

Podcast #274: Pediatric Sedation

Podcast #274: Pediatric Sedation

Author: Aaron Lessen, M.D. Educational Pearls A recent prospective observational study was performed to examine the safety of different sedation medications in the pediatric ED. This study included 6...

27 Nov 20172min

Podcast #273:  Bag Valve Masks

Podcast #273: Bag Valve Masks

Author: Sam Killian, M.D. Educational Pearls Difficulty with bag valve mask (BVM) ventilation can be addressed using the MOANS mnemonic. Mask seal, Obesity/obstruction, Age, No teeth, Sleep apnea. O...

17 Nov 20173min

Podcast #272: More on Temperature in Sepsis

Podcast #272: More on Temperature in Sepsis

Author: David Rosenberg, M.D. Educational Pearls A study of 20,000 subjects found that reducing fever in sepsis did not improve outcomes such as morbidity, mortality, or length of stay. However, corr...

16 Nov 20172min

Podcast #271: Nexus Chest CT Scan Guidelines

Podcast #271: Nexus Chest CT Scan Guidelines

Author: Chris Holmes, M.D. Educational Pearls The nexus chest CT scan rule is based on an 11,000 subject, multicenter study that looked for signs following a trauma that predicted significant finding...

13 Nov 20173min

Populært innen Vitenskap

fastlegen
tingenes-tilstand
rekommandert
jss
rss-nysgjerrige-norge
vett-og-vitenskap-med-gaute-einevoll
rss-rekommandert
sinnsyn
forskningno
villmarksliv
nordnorsk-historie
fjellsportpodden
smart-forklart
rss-paradigmepodden
aldring-og-helse-podden
diagnose
pod-britannia
rss-overskuddsliv
abid-nadia-skyld-og-skam
tomprat-med-gunnar-tjomlid