Turbulenz und High Intensity Transient Signals (HITS) als Parameter für die optimale Orientierung mechanischer Herzklappen

Doppler ultrasound has been used to detect microemboli during and after cardiopulmonary bypass (CPB). The aim of the present study was to examine the frequency of microembolic signals (MES) in patients one year after heart valve replacement, to look for possible risk factors associated with MES and for any correlation with cerebral events. One hundred patients, 69 male and 31 female, mean age 66.3 +/- 12.4 years, were examined one year after heart valve replacement. Thirty patients, 61% male and 39% female, mean age 62.5 +/- 8.7 years, who had undergone cardiovascular operations without heart valve pathology served as controls. A newly developed microemboli detector, EMEX-25 (Hatteland Instrumentering, Norway) was used to detect MES from both carotid arteries. MES were detected in 61% of the valve patients. A correlation was found between the number of MES, previous cardiovascular operations, emergency surgery and EuroSCORE (p <0.05). There was no correlation between the number of MES and the level of anticoagulation expressed as international normalization ratio (INR), atrial fibrillation, serum-cholesterol, New York heart association (NYHA) class, gender, age, valve type or valve position. The average number of MES was not increased in seven patients who had experienced major (three) or minor (transient, four) cerebral events during follow-up. In the 30 nonvalve controls, MES were detected in 46% of the patients. MES were detected in valve patients as well as in nonvalve patients one year after surgery. In valve patients, a significant correlation was found between MES and previous surgery, emergency surgery and EuroSCORE. There was no correlation between the number of MES and INR level or postoperative cerebral events.

show abstract

Carotid Doppler microembolic signals in patients one year after heart valve surgery

Dalinin

Lingaas

Hatteland

et al. 2003

Perfusion

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Turbulenz und High Intensity Transient Signals (HITS) als Parameter für die optimale Orientierung mechanischer Herzklappen

Cited by 1 publication

References 8 publications

Carotid Doppler microembolic signals in patients one year after heart valve surgery

Carotid Doppler microembolic signals in patients one year after heart valve surgery

Contact Info

Product

Resources

About