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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Jaksot(1145)

Podcast 693: Humerus Fractures

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Podcast 692: Pelvic Fractures

Podcast 692: Pelvic Fractures

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Podcast 691: TXA in Head Bleeds

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Podcast 690: Rectal Oxygen. Nice,

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Podcast 689: Peri-Intubation Hypotension

Podcast 689: Peri-Intubation Hypotension

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Podcast 688: tPA Before Thrombectomy

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Contributor: Aaron Lessen, MD Educational Pearls: DEVT Trial, a recent non-inferiority study, looked at giving tPA prior to endovascular thrombectomy and was stopped early because there was no benefi...

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Podcast 687: STI Complications

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Contributor: Jared Scott, MD Educational Pearls: PID (pelvic inflammatory disease) occurs when the infection ascends into the uterus Tubo-ovarian abscess occurs when the infection ascends to the fall...

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