Search results for "Beating heart"
showing 7 items of 7 documents
Modified hemi-Fontan procedure on the beating heart
1998
the heart by infusing the cardioplegic solution under aortic occlusion by means of the balloon throughout the procedure. Even though the balloon catheter passes through the aortic valve, significant aortic valve insufficiency is not likely to occur because of the small caliber of the balloon catheter. We believe that the clinical application of this double-lumen aortic occlusion catheter will protect the myocardium in patients with a thoracoabdominal aortic aneurysm or distal descending aortic aneurysm who undergo the operation through the left thoracotomy with DHCA.
Cardiac kinematic parameters computed from video of in situ beating heart
2017
AbstractMechanical function of the heart during open-chest cardiac surgery is exclusively monitored by echocardiographic techniques. However, little is known about local kinematics, particularly for the reperfused regions after ischemic events. We report a novel imaging modality, which extracts local and global kinematic parameters from videos of in situ beating hearts, displaying live video cardiograms of the contraction events. A custom algorithm tracked the movement of a video marker positioned ad hoc onto a selected area and analyzed, during the entire recording, the contraction trajectory, displacement, velocity, acceleration, kinetic energy and force. Moreover, global epicardial veloc…
‘Soft’ Snaring of the Coronary Artery in Minimally-Invasive Coronary Surgery
1998
A technique is described that allows a simple and safe temporary occlusion of the coronary artery in beating heart procedures using monofilament stay sutures underlaid with small pericardial pads. Postoperative serial levels of Troponin I remained low (<4 ng/L) and control angiography revealed no stenosis in the distal coronary artery.
Transapical beating-heart chordae implantation in mitral regurgitation: a new horizon for repairing mitral valve prolapse
2016
Mitral regurgitation (MR) is increasingly prevalent in western countries despite reduced incidence of rheumatic disease (1,2). MR results from several heterogeneous conditions, including disorders of the valve leaflets, mitral annulus, chordae tendineae, papillary muscles and left ventricle (LV). MR causes are roughly classified as primary (i.e. organic/structural) or secondary (i.e. functional/non-structural) (3).
Temporary occlusions of coronaries arteries by thermoreversible gel : leGoo.To experimental to human case
2011
ObjectifsThe objective of this work is to assess the feasibility of using the LeGoo gel to occlude the coronary arteries temporarily, to facilitate the performance of coronary bypass (off-pump technique), initially in pigs then in human. A Secondary objective was to evaluate the impact of the injection on the endothelium and myocardium.MethodesThe first study evaluated in pigs the feasibility of using LeGoo, while performing coronary bypass on the left anterior descending or on the right coronary artery and to evaluate the endothelial function of coronary arteries occluded by the gel.The second study analyzed endothelial function of internal thoracic arteries, in the area occluded by the ge…
Mitral Valve Repair Without Using Rings or Slings
1989
Reconstructive surgery of the mitral valve is still deemed superior to prosthetic replacement because of the lower operative risk as well as the fewer thromboembolic complications [1, 2]. Whereas closed or open commissurotomy of a stenosed mitral valve has been routine in the past and present [3], reconstructive measures for incompetent valves have been among those least often performed. The use of rigid or semi-flexible annular rings [4–9] has significantly contributed to progress in this field. However, these are not suitable for repair of all valvular lesions and undoubtedly have at least some of the negative features of prosthetic substitutes. We have therefore started a program of mitr…
The lipoprotein lipase activity in cultured beating heart cells of the post-natal rat.
1974
Summary The lipoprotein lipase (LPL) activity was studied in cultured beating heart cells of the post natal rat as a function of the culture age, from the freshly trypsinized cell suspension up to the 14th day of culture. The LPL activity remains at a practically stationary level during the first four days of culture, and then increases rapidly to reach a plateau, at a level 3–4 times higher at the 21th day of culturing. The significance of this enzymatic activity progression comparing to 3H thymidine incorporation from the point of view of cell differentiation is discussed. Our results suggest that after the 12th day of culture, cells contain their optimal enzymatic apparatus for lipid met…