First degree AV block surgery
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First degree AV block Microchapters |
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Diagnosis |
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First degree AV block surgery On the Web |
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Risk calculators and risk factors for First degree AV block surgery |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Raviteja Guddeti, M.B.B.S. [3]
Surgery
Pacemaker
Indications
Special situations when placement of permanent pacemakers is indicated in first degree heart block are:
- Hemodynamic compromise
- Pacemaker syndrome (loss of atrioventricular synchrony)
- Some neuromuscular conditions associated with first degree heart block such as
Contraindications
- Asymptomatic first degree heart block
A dual chamber DDD pacemaker is preferred over a single chambered VVI pacemakers as it maintains physiologic AV synchrony. A dual-chamber artificial pacemaker is a type of device that typically listens for a pulse from the SA node and sends a pulse to the AV node at an appropriate interval, essentially completing the connection between the two nodes. Pacemakers in this role are usually programmed to enforce a minimum heart rate.