Evaluation of biatrial function after rapid right atrial pacing in a canine model by acoustic quantification technique
- VernacularTitle:短期快速心房电活动对犬左、右心房功能影响的超声心动图研究
- Author:
Lei ZHANG
;
Xiaoping JI
;
Wei ZHANG
;
Rong WANG
;
Shiliang JIANG
;
Wenqiang CHEN
;
Xuedong SANG
;
Yun ZHANG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Cardiac pacing,artificial;
Atrial function
- From:Chinese Journal of Ultrasonography
2003;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe short-term rapid atrial electrical activation on atrial size and atrial systolic function. Methods Twelve anesthetized mongrel dogs were underwent insertion of a transvenous lead at the right atrial appendage and subjected to 5 hours of rapid right atrial pacing at 450 beat/min. Acoustic quantification(AQ) waveform on biatrial was recorded before and after 5 hours pacing with AQ technique. All measurements were made in sinus rhythm. Results After 5 hours rapid right atrial pacing, end systolic volume(ESV) of both left and right atrial enlarged significantly from ( 5.92 ? 1.51 )ml to ( 7.27 ? 1.86 )ml,from ( 3.13? 0.71 )ml to ( 3.58 ? 0.73 )ml, respectively; but biatrial function decreased markedly,left and right atrial ejection fraction decreased from ( 51.03 ? 9.45 ) to ( 38.23 ? 10.52 ),from ( 36.76 ? 5.36 ) to ( 30.71 ? 7.97 ), respectively. However, left atrial ESV enlarged more than right atrial (by 23 vs 8,P
