Objective To investigate the application effects of cardiac resynchronization therapy(CRT)of[left bundle optimization(LOT)]and biventricular pacing(BiV)in the patients with chronic heart failure complicating left bundle branch block.Methods The single center,prospective and non-randomized controlled study method was used.Forty-two patients with heart failure meeting CRT in this center from April 2020 to April 2022 were consecutively included.Among them,32 cases adopted the BiV-CRT(BiV-CRT group)and 10 cases adopted LOT-CRT(LOT-CRT group).The pacing-making parameters,quality of life scale(SF-36)score,6-min walk test(6-MWT),ECG QRS width(QRSd),left ventricular end-diastolic diameter(LVEDD),left ventricular ejection fraction(LVEF)and New York cardiac function grade(NYHA)situation were collected before surgery,after surgery immediately and in postoperative 3,6,12 months.Their complica-tions and clinical outcomes were evaluated.Results The pacing threshold value in the LOT-CRT group was stable and lower than that in the BiV-CRT group(P＜0.05);QRSd in postoperative 12 months in the LOT-CRT group was shorter than that in the BiV-CRT group[(115.0±14.3)ms vs.(133.0±14.0)ms,P＜0.05]and 6-MWT was longer than that in the BiV-CRT group[(327.0±52.8)m vs.(274.0±52.8)m,P＜0.05],and the differences were statistically significant(P＜0.05);LVEF,LVEDD,NYHA cardiac grade and SF-36 score in postoperative 12 months were improved compared with those before implantation.The rehospitaliza-tion rate of heart failure in the LOT-CRT group was lower.Conclusion LOT-CRT could obtain a narrower QRS wave and longer 6-MWT than BiV-CRT.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Sound financing mechanism is an important support for the development of health system.In response to the problems exposed in the health system during the COVID-19 pandemic,OECD countries have proposed intervention directions and investment strategies to strengthen the resilience of the health system.The investment allocation in strengthening core public health capabilities,proactive material reserves,and coordinated supply from OECD countries were analyzed,in order to explore the characteristics and effectiveness,which could provide a reference for strengthening the resilience of China's health system.

Clinics are a main institutional form for doctors to open personal business in China .The develop-ment process of clinic reflects the situation of medical staff free practice .This study summarized the supervision poli-cies on clinic in China since the founding of China and got three conclusions .The first one was the attitude of the practice of the clinic has changed significantly .The change include four stages which were authorization ( 1949—1957 ) , limitations ( 1958—1977 ) , re-authorization ( 1978—1996 ) , promotion and encourage ( 1997—) along with macroeconomic system reform and the changes of government's governance ideas on health sector .The second conclu-sion was that the government gradually raised awareness of the status and role of the clinic institutions in the health system over the past several decades .The third conclusion was the supervision policies became more meticulous .In the future , clinical institutions can be a useful supplement to public medical institutions in China for its development process and characteristics .