NMT Medical Announces Third-Quarter 2008 Financial Results MarketWatch - Nov 6, 2008 More than 29000 PFOs have been treated globally with NMT's minimally invasive, catheter-based implant technology. Stroke is a leading cause of death in the ...NMTI
Complete heart block associated with device closure of ... The Journal of Thoracic and Cardiovascular Surgery - Nov 24, 2008 Cardiac catheterization was performed after achievement of general anesthesia. Right and left heart hemodynamic assessments were performed. ...
Quintet Of Proteins Forms New, Early-warning Blood Test Before ... Science Daily (press release) - Nov 10, 2008 All had ischemia induced through accelerated pacing of the heart's main chambers. Blood samples were provided by cardiologists at the University of Texas ...
10 medical technologies to watch in 2009 Chicago Tribune, United States - Nov 13, 2008 A catheter is carefully guided through the femoral vein in the groin, up to the heart?s mitral valves. The clip on the tip of a catheter is then clamped on ...
Recent News and Articles on the Keywords: heart + catheter + mapping Related to the article below (Last Update: 8/7/2008)
Hansen Medical Reports 2008 Second Quarter Results MarketWatch - Jul 31, 2008 Its first product, the Sensei(TM) Robotic Catheter system, is a robotic navigation system that enables clinicians to place mapping catheters in ...HNSN
Early experience with epicardial ablation TheHeart.Org, NY - Jul 25, 2008 The surgeon places a bipolar clamp on the left atrium near the pulmonary veins, and ablation is performed using radiofrequency, much like a catheter...
The Blalock-Taussig-Thomas Collaboration A Model for Medical Progress Journal of American Medical Association (subscription), IL - Jul 15, 2008 7-8 Hybrid catheter interventional procedures simultaneously performed with surgical intervention have also addressed challenging issues in complex ...
Hansen Medical Gets FDA Clearance for CoHesion Module Trading Markets (press release), CA - Jul 8, 2008 The integrated EP solution offers a software interface between the Hansen Medical Sensei Robotic Catheter system and the EnSite System advanced mapping...HNSN - OTC:CMTX - STJ
Suit: Doctor put patients through unneeded tests Examiner.com - Jul 21, 2008 McLean has not been charged with a crime, though he voluntarily forfeited his catheterization laboratory credentials two years ago. ...
Letter: Ricky Arsenault updates supporters on surgery Register Your Thoughts, ME - Jul 24, 2008 His procedure will involve insertion of a catheter into my femoral artery and running it up into my facial network of jumbled arteries and veins. ...
CR Bard, Inc. Q2 2008 Earnings Call Transcript Seeking Alpha, NY - Jul 23, 2008 Our performance here is driven by strong products for mapping both sides of the heart. On the left side, the primary arrhythmia analysis is rate fit but ...BCR
Lane opens cardiovascular center 2TheAdvocate, LA - AP Business The $4 million dollar project features a catheterization lab and CT scanner in the same suite. The hospital noted the facilities allow it to ...
Heart mapping technique safely guides catheter repair of arrhythmia
In experiments with dogs, researchers at Johns Hopkins successfully used a 3D map of the heart and sensor-guided catheter to perform cardiac ablation, a mainstay treatment that stops abnormally fast and potentially fatal arrhythmias.
The Hopkins findings, presented at the American Heart Association's Scientific Sessions 2005, provided information and technology used by the U.S. Food and Drug Administration to approve the system for testing in humans.
The Hopkins team created their own 3D models of each heart from images obtained by integrating and superimposing CT and MRI scans. Using an upgraded computer software program known as electro-anatomic mapping, the scientists are able to color-code the heart models' structures.
The researchers safely ablated, or destroyed, tiny areas of diseased heart tissue that facilitate rhythm disturbances, guided only by these anatomically precise, reconstructed 3D map.
During the procedure, a catheter containing a magnetic sensor in its tip is inserted through a vein in the dog's leg, then guided to the heart, where it is used to burn off the small part of heart muscle that gives rise to the errant signaling responsible for the arrhythmia.
A magnetic location pad was placed under the operating table and situated directly beneath the animal's body to detect the position of the catheter and compare it to the computer-generated image of the heart displayed on a screen.
" This is a significant improvement for patient safety and the performance of minimally invasive procedures in the heart," says study senior investigator and cardiologist Timm Dickfeld, at The Johns Hopkins University School of Medicine and its Heart Institute.
Dickfeld points out that current methods for visualizing the heart, using X-rays and fluoroscopy, are potentially hazardous because they involve radiation and produce only two-dimensional images, which are not as accurate as 3D images.
Our study proves the effectiveness of 3D mapping in guiding and pinpointing the catheter's tip during a procedure, giving the electrophysiologist a more concrete awareness on the placement of lesions, and it eliminates the need for an X-ray, reducing the amount of radiation exposure for the patient," he adds.
As part of the study, the Hopkins researchers performed catheter ablation in nine dogs who had nearly 50 CT markers, small wafer-like targets that could be seen by a scanner, surgically implanted on the outside of their hearts' muscle wall. The placement of the wafers covered all regions of the heart, especially those where arrhythmia are known to occur. Three-dimensional maps of the hearts, made shortly before the procedure, were then used to guide the catheter to their targets.
After the procedure, analysis of heart tissue showed that the 3D maps worked very well and were extremely precise and safe, Dickfeld says. The range of errors in pinpointing therapy to a lesion was between 1.9 millimeters and 4.9 millimeters, and well within lesion boundaries that average 6 millimeters in diameter.
" A physician really needs precise anatomical information during ablation because one move in the wrong direction could damage healthy heart tissue or puncture the organ," says study lead investigator Jun Dong, at Hopkins.
Previous research by Dong and colleagues showed complications like this occur in nearly 5 percent of catheter ablation procedures for atrial fibrillation.
