Active clinical trials for "Heart Valve Diseases"

Robotic surgery is one of the most popular minimally invasive procedures for patients with coronary artery disease or valvular diseases. Studies have shown that, as compared to conventional sternotomy, patients underwent robot-assisted bypass grafting or valvuloplasty had less post-operation pain, blood transfusion volume during operation, re-operation rate, post-operation stroke rate and length of hospitalization. However, most studies focused on the comparison of complications of different procedures, and the investigation of cardiopulmonary function recovery is still lacking. Thus our study is to compare the functional outcomes between patients that undergo different surgical procedures.

The primary objective of this study is to compare two different regimens of therapy, AVK and ASA (aspirin), in the early postoperative period after aortic valve replacement with SJM Epic™ or SJM Epic™ Supra Porcine Bioprosthetic Heart Valve by establishing the adverse event free survival rate at 3 month post intervention follow-up of the 2 groups(with special focus on thromboembolic events and bleedings).

This trial is an open-label, two-arm, cluster-randomized, controlled trial with cardiovascular surgical teams as the unit of randomization. Eligible teams with written consent are randomized to the intervention or control arm by random number generator. Computer-based, multicomponent intervention targeting on reduction of perioperative antimicrobial use will be delivered to teams in the intervention arm. Teams in the control arm will continue with usual clinical care.

The purpose of this study is to determine sevoflurane's dose-dependent effect on left ventricular (LV) function in cardiac surgery. The change of tissue Doppler imaging (TDI) of lateral mitral valve annular velocity at three different sevoflurane concentrations would be analyzed by using intraoperative transesophageal echocardiography (TEE)in cardiac surgery patients.

CD39 and CD73 was known protein expressed on surface of Th1 and Th17 cell and modulate immune related reaction. Cardiopulmonary bypass (CPB) can induce inflammatory reaction during cardiac surgery, and induce immunosuppression. Propofol and volatile anesthetics were related to immune reaction. However, the effect of propofol and sevoflurane on the change of CD39 and CD73 after CPB was not evaluated in previous studies. The authors hypothesized that the expression of CD39 and CD73 would differ between propofol- and volatile anaesthetic-based anaesthesia in patients undergoing CPB. Therefore, the present study determined the effect of propofol and sevoflurane on CD39 and CD73 during and after CPB.

The purpose of this study is to compare a new high vacuum pressure chest drainage system (NO-NUMO™) with the standard low vacuum pressure drainage system already in use in cardiac surgeries. The new system uses smaller diameter drainage tubing to remove blood from the chest after open heart surgery. This is less painful to the patient and should help the patient to breathe better after operation. Preliminary data suggests that the high vacuum suction is effective and practical, and could actually reduce the amount of chest tube bleeding after surgery without compromising heart function. This new high vacuum drainage system was approved by the FDA in 2002. Subsequent testing at University of California, Irvine indicated that this unique system may allow the surgeon to predict excessive postoperative bleeding before the patient is transferred out of the operating room, thus adding safety, convenience, and cost effectiveness to their use.

Valvular repair and repair surgery is rapidly progressing yet rather challenging aspect of current cardiosurgical practice. Several approaches were introduced into the clinical practice to alleviate systemic inflammatory response induced by cardiopulmonary bypass and organ-specific injury including meticulous haemodynamic monitoring, pharmacological heart preconditioning, systemic use of anti-inflammatory agents, prevention of coagulopathy, and induced topical and systemic hypothermia. An in-depth monitoring of haemodynamics, oxygen transport, and vascular permeability is of a great clinical value to control the efficacy of these approaches. Therefore, the aim of this study was to compare two algorithms of goal-directed therapy aimed to achieve a postoperative haemodynamic optimization in combined valve repair surgery.

The aim of the study is to evaluate the effects of intermittent hypoxic-hyperoxic training (IHHT) to protect myocardium against perioperative myocardial injury during cardiac surgery using cardiopulmonary bypass.

Right ventricular (RV) failure after cardiac surgery is associated with morbidity and mortality, but is hard to diagnose with conventional echocardiographic means. RV dysfunction may be associated with hepatic congestion, which may have an effect on portal veinous flow, but this has not been extensively. The investigators aimed determine whether an increased pulsatility in the portal venous flow was associated with RV dysfunction, after cardiac surgery at risk of RV dysfunction: mitral and tricuspid valve procedures.

The aim of this study is to evaluate the effect of power breath device on arterial blood gases, diaphragmatic excursion and the 6 min walk test after cardiac valve surgery.