Angioplasty, Balloon, Coronary ; instrumentation ; Cardiac Catheterization ; Humans ; Myocardial Infarction ; therapy

Adult ; Balloon Occlusion ; instrumentation ; Cardiac Catheterization ; instrumentation ; Ductus Arteriosus, Patent ; surgery ; Female ; Humans ; Ligation ; instrumentation ; Recurrence

Cardiac Catheterization ; Heart Septal Defects, Ventricular ; therapy ; Humans ; Prosthesis Implantation ; instrumentation ; Septal Occluder Device

Adult ; Cardiac Catheterization ; instrumentation ; Device Removal ; Heart Septal Defects, Atrial ; therapy ; Humans ; Male ; Retreatment

AIMTo introduce a new device and catheter to be determining cardiac output through cor sinistrum with thermodilution.

METHODSOwn control was introduced in eight dogs. A pulmonary thermodilution catheter was used through the cor dextrum of the dogs; The new-design catheter was used through artery, and there were two situs to fix:its ahead in left atrium and the ahead near to aortic root. Determine cardiac output (CO) under four circumstances: controlled respiration, apnoea, in controlled hypotension, after controlled hypotension.

RESULTSThere was no significant difference among the parameters (CO and cardiac index) of all circumstances. The CO determined by the pulmonary thermodilution catheter and those by the new-design catheter in two situs were positive correlation, and the gamma were 0.986, 0.989; likewise, the cardiac index (CI) was positive correlation, and the gamma were 0.983, 0.985. The CO and CI by the new-design catheter between two situs were positive, and the gamma were 0.992, 0.988.

CONCLUSIONThe parameters by the new-design catheter and those by the pulmonary thermodilution catheter were concordant. In comparison with the pulmonary thermodilution catheter, the new-design catheter had simple device and could be easily operated.

Animals ; Cardiac Output ; physiology ; Catheterization, Swan-Ganz ; instrumentation ; Dogs ; Thermodilution ; methods

Adult ; Cardiac Catheterization ; instrumentation ; Ductus Arteriosus, Patent ; therapy ; Equipment Failure ; Female ; Humans ; Male ; Young Adult

OBJECTIVETo evaluate the efficacy and safety of domestic left-disk-coated atrial septal occluder on treating patent foramen ovale in a miniswine model.

METHODSForamen ovale was punctured in 12 Guangxi BA-MA miniswine and occluded by domestic left-disk-coated atrial septal occluder (Spider(TM) PFO closure system) under the guidance of fluoroscopy. After occlusion, miniswine were executed after transthoracic echocardiography examination with color Doppler at month 1, 2, 3 and 6 respectively for gross inspection and microscopic examinations.

RESULTSThere were no vegetation, thrombosis, broken stent, or erosion on the surface of all devices. The PFOs were completed occluded as evidenced by transthoracic echocardiography at 1 to 6 months after operation. The surface of the device was fully covered by collagen tissue and endothelial tissue at 1 month after operation and the thickened gradually thereafter.

CONCLUSIONSThe domestic left-disk-coated atrial septal occluder can efficiently occlude patent foramen ovale. Satisfactory biocompatibility, rapid and complete endothelium covering and low incidence of complication are also evidenced for this closure system in our experiment.

Animals ; Cardiac Catheterization ; instrumentation ; Foramen Ovale, Patent ; therapy ; Swine ; Swine, Miniature

BACKGROUNDThe transradial approach is regarded as a useful vascular site for coronary procedures. The aim of this study was to test whether 4Fr catheters assisted by ACIST variable rate injector system can produce comparable angiographic quality and reduce the risk of radial artery injury compared to hand manifold 6 Fr catheters.

METHODSA total of 1816 patients were studied consecutively, among whom 856 patients received coronary angiography by 4 Fr catheters (4Fr group) and 960 patients by 6 Fr catheters (6Fr group). Angiographic and procedural characteristics were observed and recorded. The luminal inner radial arterial diameter before and after the procedure were collected.

RESULTSThe baseline clinical characteristics were similar in both groups. There were no significant differences in procedure time, radiation dose and quality scores in both groups (P > 0.05), but more contrast media was delivered in the 6Fr group (P < 0.001). The mean radial arterial diameter six months after the procedure in the 6Fr group reduced significantly compared to that measured one day prior to the procedure (P < 0.001).

CONCLUSIONSCoronary angiography using the 4Fr catheters with Acist power injection system can achieve an acceptable diagnostic quality while at the same time minimizing radial artery injury and contrast media consumption.

Aged ; Cardiac Catheterization ; instrumentation ; Coronary Angiography ; instrumentation ; methods ; Female ; Humans ; Male ; Middle Aged ; Radial Artery ; diagnostic imaging ; Ultrasonography

OBJECTIVETo analyse the reasons for pacing lead abandonment during pacemaker replacement.

METHODClinical data of patients underwent permanent pacemaker replacement between Jan 1st, 1976 to Dec 31st 2006 in Fuwai Hospital were obtained and the reasons for pacing leads abandonment were analyzed.

RESULTSPacemaker was replaced in 1023 patients during this period and 235 pacing leads were abandoned, 131 leads (55.7%) were abandoned for leads malfunction, including leads body fracture (35, 14.9%), isolation defects (10, 4.3%), dislocations (10, 4.3%) and excessively high threshold values (76, 32.3%). Other reasons for leads abandonment were infection (50, 21.3%), incompatibility between the leads and new generator (30, 12.8%), need to degrade the pacing system (13, 5.5%) and other rare reasons (11, 4.7%).

CONCLUSIONThe most often reason for leads abandonment during pacemaker replacement is lead malfunction, including lead body fracture, isolation defect, dislocation and excessively high threshold value of the leads.

Cardiac Catheterization ; instrumentation ; methods ; Cardiac Pacing, Artificial ; methods ; Equipment Failure ; Equipment Safety ; Female ; Heart Failure ; therapy ; Humans ; Male ; Pacemaker, Artificial

Cardiac Catheterization ; Cardiac Surgical Procedures ; instrumentation ; methods ; Heart Septal Defects, Ventricular ; therapy ; Humans ; Male ; Thoracic Injuries ; complications