Cardiac conductive system excitation maps using intracardiac tissue Doppler imaging.
OBJECTIVE
To precisely visualize cardiac anatomic structures and simultaneously depict electro-mechanical events for the purpose of precise underblood intervention.


METHODS
Intracardiac high-resolution tissue Doppler imaging was used to map real time myocardial contractions in response to electrical activation within the anatomic structure of the cardiac conductive system using a canine open-chest model.


RESULTS
The detailed inner anatomic structure of the cardiac conductive system at different sites (i.e., sino-atrial, atrial wall, atrial-ventricular node and ventricular wall) with the inside onset and propagation of myocardial velocity and acceleration induced by electrical activation was clearly visualized and quantitatively evaluated.


CONCLUSIONS
The simultaneous single modality visualization of the anatomy, function and electrical events of the cardiac conductive system will foster target pacing and precision ablation.
Yin
Lixue
L
Echocardiography Laboratory, Sichuan Provincial Hospital, Chengdu 610071, China. yinlixue@yahoo.com
Zheng
Changqiong
C
Cai
Li
L
Zheng
Yi
Y
Li
Chunmei
C
Deng
Yan
Y
Luo
Yun
Y
Li
Deyu
D
Zhao
Shukui
S
D000818:Animals; D004285:Dogs; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D006329:Heart Conduction System / Q000000981:diagnostic imaging* / Q000502:physiology*; D009200:Myocardial Contraction; D012849:Sinoatrial Node / Q000000981:diagnostic imaging / Q000502:physiology