Core IM | Internal Medicine Podcast

#123 Pacemakers & ICDs: 5 Pearls Segment

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Apr 12, 2023
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INSIGHT

Pacemaker Functions and Types

  • Pacemakers prevent slow heart rates, coordinate heart chambers, and synchronize ventricular contractions.
  • Three types of pacemakers exist: single-chamber, dual-chamber, and biventricular (CRT).
ADVICE

Pacemaker Indications

  • Consider pacemakers for sinus node dysfunction (bradycardia, tachy-brady) or AV conduction disease.
  • Symptomatic or high-grade AV block necessitate pacing.
INSIGHT

CRT Pacemakers

  • CRT pacemakers (three leads) are used for heart failure with low ejection fraction (less than 35%).
  • This is specifically indicated when a left bundle branch block causes ventricular desynchrony.
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