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)

Laboring Under Pressure Episode 3: Hypertensive Disorders of Pregnancy with Dr. Kiersten Williams

Laboring Under Pressure Episode 3: Hypertensive Disorders of Pregnancy with Dr. Kiersten Williams

Contributor: Kiersten Williams MD, Travis Barlock MD, Jeffrey Olson MS3 Show Pearls Hypertensive disorders of pregnancy are one of the leading causes of maternal mortality worldwide. Hypertension ...

12 Sep 202428min

Episode 920: Pediatric Growth Estimates

Episode 920: Pediatric Growth Estimates

Contributor: Sean Fox, MD Educational Pearls: Newborns may lose up to 10% of their birth weight in the first week of life Weight loss is greatest in exclusively breastfed infants Should regain ...

9 Sep 20246min

Episode 919: EKG Criteria for Adenosine

Episode 919: EKG Criteria for Adenosine

Contributor: Travis Barlock, MD Educational Pearls: SVT: supraventricular tachycardia Pharmacotherapy for SVT includes drugs that block the AV node, such as adenosine EKG criteria before adeno...

4 Sep 20241min

Episode 918: Automated Blood Pressure Cuffs

Episode 918: Automated Blood Pressure Cuffs

Contributor: Aaron Lessen, MD Educational Pearls: How does an automated blood pressure cuff work? Automated blood pressure cuffs work differently than taking a manual blood pressure. While taking ...

26 Aug 20242min

Episode 917: Heat-Related Illnesses

Episode 917: Heat-Related Illnesses

Contributor: Megan Hurley, MD Educational Pearls: Heat cramps Occur due to electrolyte disturbances Most common electrolyte abnormalities are hyponatremia and hypokalemia Heat edema Caus...

19 Aug 20244min

Episode 916: Central Cord Syndrome

Episode 916: Central Cord Syndrome

Contributor: Taylor Lynch, MD Educational Pearls: What is Central Cord Syndrome (CCS)? Incomplete spinal cord injury caused by trauma that compresses the center of the cord More common in hyperext...

12 Aug 20246min

Episode 915: Severe Burn Injuries

Episode 915: Severe Burn Injuries

Contributor: Megan Hurley, MD Educational Pearls: Initial assessment of patients with severe burn injuries begins with ABCs Airway: consider inhalation injury Breathing: circumferential burns ...

5 Aug 20244min

Podcast 914: Neuroleptic Malignant Syndrome (NMS)

Podcast 914: Neuroleptic Malignant Syndrome (NMS)

Contributor: Taylor Lynch, MD Educational Pearls: What is NMS? Neuroleptic Malignant Syndrome Caused by anti-dopamine medication or rapid withdrawal of pro-dopamenergic medications Mechanism is ...

29 Jul 202410min

Populært innen Vitenskap

fastlegen
smart-forklart
tingenes-tilstand
jss
sinnsyn
rekommandert
villmarksliv
rss-rekommandert
forskningno
tomprat-med-gunnar-tjomlid
vett-og-vitenskap-med-gaute-einevoll
fjellsportpodden
rss-paradigmepodden
pod-britannia
aldring-og-helse-podden
tidlose-historier
diagnose
nordnorsk-historie
nevropodden
rss-lundqvist-podden