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/

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Podcast 686: Vaginal Self Swabs

Podcast 686: Vaginal Self Swabs

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Podcast 685: Cultural Sensitivity with LGBTIQ+ Patients

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Contributor: Dr. Nick Gorton, MD Educational Pearls: Use transgender people's correct names and pronouns, the Russell study found a 56% reduction in suicide behavior with chosen name usage ⅕ to ½ of ...

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Podcast 684: Acidosis

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Podcast 683: Zofran vs. Haldol for Cannabinoid Hyperemesis Syndrome

Podcast 683: Zofran vs. Haldol for Cannabinoid Hyperemesis Syndrome

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Podcast 682: Snake Bites

Podcast 682: Snake Bites

Contributor: Gretchen Hinson, MD Educational Pearls: Pit vipers include cottonmouths, rattlesnakes, and copperheads All have folding long fangs, triangular face, and elliptical pupils About 5,00...

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Podcast 681: Internal Hernias

Podcast 681: Internal Hernias

Contributor: Adam Barkin, MD Educational Pearls: Internal hernias, when bowel herniates through iatrogenic or congenital defect in mesentery, represent 1-6% of all small bowel obstructions Mortality...

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Podcast 680: Coronary Artery Dissection

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Contributor: Adam Barkin, MD Educational Pearls: Spontaneous coronary artery dissection (SCAD) is the most common cause of acute MI in women under 50 years old Risk factors include fibromuscular dys...

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Podcast 679: Antibiotics for CAP

Podcast 679: Antibiotics for CAP

Contributor: Peter Bakes, MD Educational Pearls: Community-acquired pneumonia (CAP) is normally stratified into outpatient-candidates vs. inpatient candidates for treatment For outpatient treatment,...

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