First degree AV block surgery
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First degree AV block Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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First degree AV block surgery On the Web |
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American Roentgen Ray Society Images of First degree AV block surgery |
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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: Mohammed Salih, M.D., Cafer Zorkun, M.D., Ph.D. [2], Raviteja Guddeti, M.B.B.S. [3]
Surgery
| Atrioventricular block | |||||||||||||||||||||||||||||||||||||
| Marked First-degree AV blocl | |||||||||||||||||||||||||||||||||||||
| Symptoms | |||||||||||||||||||||||||||||||||||||
| Yes | No | ||||||||||||||||||||||||||||||||||||
| Permanent pacing (class 2a) | Lamin A/C, neuromascular disease | ||||||||||||||||||||||||||||||||||||
| Yes | No | ||||||||||||||||||||||||||||||||||||
| Lamin A/C | Observation | ||||||||||||||||||||||||||||||||||||
| Yes | No | Permanent pacing (class3:Harm) | |||||||||||||||||||||||||||||||||||
| Pemanent pacing | Neuromascular disease | ||||||||||||||||||||||||||||||||||||
| Yes | |||||||||||||||||||||||||||||||||||||
| Permanent pacing | |||||||||||||||||||||||||||||||||||||
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.