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The effect of endocardial defibrillator shocks on basic atrial electrophysiology in man Is post cardioversion atrial electrical 'remodelling' artefact?
- Source :
- Europace. 5:33-37
- Publication Year :
- 2003
- Publisher :
- Oxford University Press (OUP), 2003.
-
Abstract
- Aims To determine the effect of an endocardial DC shock on the basic electrophysiology of the human atrium if delivered in sinus rhythm. Methods and results A 5J endocardial R wave synchronized DC shock was delivered in 10 patients in stable sinus rhythm during ICD implantation for ventricular arrhythmias. There was no prior history of atrial fibrillation. Monophasic action potential duration (APD) and atrial effective refractory periods (AERP) were evaluated before, 1 min post DC shock, and 15 min post shock. These parameters were assessed at basic cycle lengths and at atrial paced cycle lengths of 600 ms and 400 ms at two right atrial sites; mid lateral right atrial wall (MRLA) and the right atrial appendage (RAA). There were no significant differences in APD 90, AERP or atrial refractory dispersion at any site or drive cycle length before, immediately after or 15 min after shock delivery. Conclusions There are no significant changes in basic electrophysiological parameters following a DC shock delivered in sinus rhythm in patients with no prior history of atrial fibrillation. This suggests that atrial electrical remodelling occurs as a result of atrial fibrillation and is unrelated to shock artefact. (Europace 2003; 5: 33–37)
- Subjects :
- Male
medicine.medical_specialty
Electric Countershock
QRS complex
Physiology (medical)
Internal medicine
Atrial Fibrillation
medicine
Humans
Sinus rhythm
cardiovascular diseases
Atrial electrophysiology
Atrium (heart)
business.industry
P wave
Atrial fibrillation
Middle Aged
Atrial Function
medicine.disease
Defibrillators, Implantable
Electrophysiology
medicine.anatomical_structure
Shock (circulatory)
cardiovascular system
Cardiology
Female
medicine.symptom
Artifacts
Electrophysiologic Techniques, Cardiac
Cardiology and Cardiovascular Medicine
business
Subjects
Details
- ISSN :
- 10995129
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Europace
- Accession number :
- edsair.doi.dedup.....851393844d67bca179122b237bed01fd