EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Electrophysiologic assessment before and after surgery for atrial defects: influence of volume overload of the right heart on the conduction system


Nihon Kyobu Geka Gakkai 35(11): 1974-1979
Electrophysiologic assessment before and after surgery for atrial defects: influence of volume overload of the right heart on the conduction system
Electrophysiologic studies were performed in 27 children with atrial septal defect (ASD) before and after surgical closure. Basal cycle length (BCL), AH and HV intervals, paced atrial cycle length at which the atrioventricular node developed the wenckebach phenomenon (WCL), sino-atrial conduction time (SACT), corrected sinus node recovery time (CSNRT) and atrial effective refractory period (AERP) were determined. Electrophysiologic abnormalities were found in 78% of 27 children studied preoperatively. They were found in every item except BCL. There was no correlation between the Qp/Qs ratio and each item. Twenty-seven children studied preoperatively were divided into two groups, younger and older, according to age. In the older group, the mean values of every item were higher than in the younger group. Sixteen children with surgical intervention could be compared preoperatively and postoperatively. AH, WCL, CSNRT and AERP decreased significantly after operation. In WCL, CSNRT and AERP, most of abnormal values before operation decreased to normal range after operation. These observations indicate that the conduction system dysfunctions are present after operation of ASD, increase with age and can be restored to some extent by an operation. Conduction system dysfunctions would seem to be associated with hemodynamics of ASD, and it is suggested that volume overload of the right heart in ASD leads to conduction system dysfunctions.


Accession: 005349256

PMID: 3446712



Related references

Heart conduction system anatomy in the surgery of atrial, septal defects. Thoraxchirurgie, Vaskulare Chirurgie 19(1): 41-46, 1971

Sinus node function and conduction system before and after surgery for secundum atrial septal defect: an electrophysiologic study. American Journal of Cardiology 53(10): 1415-1420, 1984

Electrophysiologic studies of the heart conduction system of patients with the paroxysmal form of atrial fibrillation and the sick sinus syndrome. Vrachebnoe Delo: 60-62, 1987

Ablation of focal atrial arrhythmia in patients with congenital heart defects after surgery: role of circumscribed areas with heterogeneous conduction. Heart Rhythm 3(5): 526-535, 2006

Atrio ventricular conduction and right atrial volume in children with and without secundum atrial septal defects. British Heart Journal 46(1): 69-73, 1981

Increased plasma levels of natriuretic peptide type B and A in children with congenital heart defects with left compared with right ventricular volume overload or pressure overload. Clinical Physiology and Functional Imaging 25(5): 263-269, 2005

Electrophysiologic assessment of conduction abnormalities and atrial arrhythmias associated with amyloid cardiomyopathy. Heart Rhythm 13(2): 383-390, 2016

Influence of defect closure on cardiopulmonary performance in children with an atrial septal defect and right heart volume overload. European Heart Journal 21(Abstract Supplement): 433, August-September, 2000

Right atrial ultrastructure in congenital heart disease. II. Atrial septal defect: effects of volume overload. American Journal of Cardiology 43(4): 820-827, 1979

Rotigaptide (ZP123) improves atrial conduction slowing in chronic volume overload-induced dilated atria. Basic & Clinical Pharmacology & Toxicology 99(1): 71-79, 2006