Circulation. Cardiovascular imaging.
Publisher:
Lippincott Williams & Wilkins
Frequency: Bimonthly
Country: United States
Language: English
Author(s):
American Heart Association.
Start Year:2008 -
ISSN:
1941-9651 (Print)
1942-0080 (Electronic)
1941-9651 (Linking)
1942-0080 (Electronic)
1941-9651 (Linking)
Impact Factor
5.6
2022
| NLM ID: | 101479935 |
| (OCoLC): | 223447038 |
| LCCN: | 2008215168 |
| Classification: | W1 CI737 |
Influence of atrioventricular interaction on mitral valve closure and left ventricular isovolumic contraction measured by tissue Doppler imaging. The influence of atrioventricular (AV) interaction on mitral valve closure (MVC) and left ventricular (LV) isovolumic contraction is not fully clarified. We investigated the relationship among AV delay, MVC, and LV isovolumic contraction using a horse model because of the low heart rate and physiologically long AV delay. Results: Six horses were evaluated during sinus rhythm, right ventricular pacing without preceding atrial contraction, and dual-chamber pacing at AV delays of 150 to 350 ms, programmed at a constant rate. Right parasternal 4-chamber views were recorded for simultaneous measure...