心房纤维性颤动对心功能的影响——B型超声心动图分析研究

The Influence of Cardiac Function in Atrial Fibrillation: B-Echocardiographic Study

应用B型超声心动图结合M型超声心动图研究了42例房颤病人的心功能。通过对EDV、ESV、SV、CO、EF％、△D％及mvcf的研究,发现心率是影响房颤心功能的主要因素,随着心率的增加,EDV、SV及EF值呈线性降低。在风心病二尖辦狭窄病人最大二尖辦口面积对EDV及SV有轻度影响。恢复窦性心律后,心功能的改善尚与心肌收缩力的加强有关。

The cardiac function in 42 cases (18 males and 24 females) with atrial fibrillation was studied with two-dimensional echocardiograms and M-echocar- diograms. The data of cardiac function as EDV, ESV, SV, CO, CL, EF%, D% and mvcf were analysed and calculated. Our results show that HR is a main factor affecting cardiac function in atrial fibrillation and EDV, SV, and EF％ progressively decrease with HR increasing. Maximal mitral valve opning area in mitral stenosis affects cardiac function only slightly. There are no influe- nces between atrial fibrillation duration, underlying diseases and left atrial di- mensions to cardic function. Our results also demonstrate that the cardiac func- tion is obviously improved after cardioversion of atril fibrillation. The mecha- nism of the improvement of cardic function following cardioversion is not only due to the recovery of atrial fibrillation and increment of ventricular filling but also increment in myocardial contractility.