|
|
|
| Relationship between left ventricular energy and energy efficiency in coronary heart disease and cardiac function |
| ZHAO Wen-qiang1, WANG Jun1, ZHAO Feng-lan2, MA Ji-xiang2, ZHU Qiu-ju2 |
| 1.Department of Cardiology, the Fourth Affiliated Hospital of Jiangsu University, Zhenjiang Jiangsu 212003, China;2.Huaibei People’s Hospital, Huaibei Anhui 235000, China |
|
|
|
|
Abstract Objective: To study the relationship between left ventricular energy(LVE) and energy efficiency(EE) in patients with coronary heart disease and cardiac reserve. Methods: Modified models of LVE and EE under Doppler echocardiography were constructed according to pressure-volume potential energy theory based on cardiac catheter. LVE index and ejection fraction(EF) in 70 patients with different numbers of diseased coronary artery based on coronary angiography and various cardiac function classification of NYHA and 28 normal individuals were investigated by comparison of echo-method with catheter-method, different cardiac function classification of pressure-volume loop energy figures were drawn. Results: Total energy(TE), stroke work(SW), end-systolic potential energy(ESE), filling energy(FE) and EE determined by echo-method were highly coincided and related with those by catheter-method(r=0.80~0.91). Increase of ESE, FE and TE, decrease of EE and EF and right-up shift of P-V loops showed gradually as numbers of diseased vessels increasing and NYHA classification enlarged. Sensitivity of prediction of abnormal EE for different NYHA classification is significantly higher than that of abnormal EF(P<0.05). Conclusion: LVE and EE by echo-method are reliable and feasible and have higher advantage of EF to evaluating cardiac reserve of coronary heart disease.
|
|
Received: 26 March 2007
|
|
|
|
|
|
|
|
|
2007, Vol. 18 
