1. METHODS: The isolated right papillary muscle of cat was used to assess the positive inotropic effects by cummulative concentrations of Ibo and Oua.

2. Objective:To investigate the characteristics of papillary muscle dysfunction (PMD) in acute myocardial infarction(AMI) by using of echocardiography, and to evaluate its clinical significance.

3. Group A: anterior leaflet and a branch of papillary muscle was sutured to original place respectively.

4. Electropharmacological effects of resibufogenin(RBG)on guinea pig papillary muscle were studied by means of conventional glass microelectrode technique.

5. RESULTS: In isolated papillary muscle, ropivacaine reduced force of contraction in a concentration-dependent manner.

6. Objective To investigate the relationship between papillary muscle dysfunction and mitral regurgitation in patient with obsolete myocardial infarction.

7. AIM: To observe the effects of cyclovirobuxine-D(CVB-D) on isolated guinea pig right atria and papillary muscle.

8. Objective:To investigate the CVIB and CVIB% of ischemic myocardium in long axis(LAX)view and short axis(SAX)view in papillary muscle level(PM).

9. Aim To investigate the effects of propafenone on myocardium inotropism and explore it's possible mechanism in isolated papillary muscle of guinea pig.

10. Left ventricular false tendonsmostly attached the interventricular septum and the posterior papillary muscle, the papillary muscle and the free wall.

11. The purpose of the present study was to discribe the cardiac cross sectional anatomy and the papillary muscle length and architecture angularity.

12. The IBS indexes( CVIB and AII) of posterior wall were obtained from short-axis view at papillary muscle level.

13. With the study of histological sections and arterial casts, it is found that there is no so called single central core artery and present at least 2 arteries in each papillary muscle.

14. So the epicardial and intramyocardial flow distributed "T" like. 1 to 2 long line flow signals in 4 dogs and many in 1 dog were found entering the myocardium and reach directly papillary muscle.

15. The left ventricular bands mostly attach the interventricular septum and the lateral wall, the interventricular septum and the posterior papillary muscle.

16. Single sodium channel currents were recorded by patch clamp technique in isolated guinea pig ventricular myocytes, and action potentials of papillary muscle and ECG were conventionally measured.

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17. The influence of inosine on the contractility of isolated papillary muscle indicated that it had a direct, positive inotropic action on the myocardium.

18. The right ventricular bands are in the inflow tract and the apex of the right ventricle, they mostly attach rhe interventricular septum and the anterior wall or the anterior papillary muscle.

19. To investigate the effect of lactate solution of different concentration on action potential of ventricular papillary muscle cell and contractile force.

20. OBJECTIVE To explore the electrophysiological effects of cyclovirobuxine D (CVB-D) on the isolated right ventricular papillary muscle of rats.

21. Results:The regressive valvulopathy was misdiagnosed easy as rheumatic heat disease, regressive valvulopathy infectious, endocarditis dysfunction and rupture of papillary muscle ect.