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 # 472: SMART Crystalloids

Podcast # 472: SMART Crystalloids

Author: Gretchen Hinson, MD Educational Pearls: In most healthcare settings, normal saline (NS) has become ubiquitous as an intravenous fluid despite some potential drawbacks Compared to normal salin...

23 Mai 20195min

Podcast # 471: Cyclic Vomiting

Podcast # 471: Cyclic Vomiting

Author: Don Stader, MD Educational Pearls: Cyclic vomiting syndrome (CVS) is different than cannabis hyperemesis syndrome (CHS). It is important to differentiate the two. CHS is thought to be caused ...

21 Mai 20194min

Podcast # 470: Zofran and Pregnancy

Podcast # 470: Zofran and Pregnancy

Author: Jared Scott, MD Educational Pearls: Ondansetron (Zofran) is one of the latest drugs that has had concerns raised about side effects, particularly in pregnancy 2018 study probed two birth defe...

17 Mai 20193min

Podcast # 469: Go PO

Podcast # 469: Go PO

Author: Dave Rosenberg, MD Educational Pearls: Nothing by mouth (NPO) status routinely used before surgery to reduce the theoretical risk of aspiration However, surgery poses a large physiological st...

16 Mai 20193min

Podcast # 468: Typhlitis

Podcast # 468: Typhlitis

Educational Pearls: Tiflitis refers to the presence of enterocolitis in the setting of neutropenia - also known as neutropenic enterocolitis Commonly a result of chemotherapy for hematologic malignan...

14 Mai 20192min

Podcast # 467: Cauda Equina Syndrome

Podcast # 467: Cauda Equina Syndrome

Author: Erik Verzemnieks, MD Educational Pearls: Cauda equina syndrome is caused by the compression of the nerve roots that extend beyond the termination of the spinal cord Trauma, infection, hematom...

9 Mai 20192min

Podcast # 466: Subacute Sclerosing Panencephalitis

Podcast # 466: Subacute Sclerosing Panencephalitis

Author: Nicholas Hatch, MD Educational Pearls: Measles has a period of infectivity starts before the appearance of the characteristic rash, up to 4-5 days A devastating consequence of measles is Suba...

6 Mai 20193min

Podcast # 465: As easy and 1, 2, 10 - Capillary Refill and Sepsis

Podcast # 465: As easy and 1, 2, 10 - Capillary Refill and Sepsis

Author: Ryan Circh, MD Educational Pearls: The 2019 ANDROMEDA-SHOCK trial compared using serum lactates to capillary refill assessment in septic shock patients to guide resuscitation Capillary refill...

5 Mai 20192min

Populært innen Vitenskap

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