Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where David E. Ritscher is active.

Publication


Featured researches published by David E. Ritscher.


IEEE Transactions on Biomedical Engineering | 2008

A Detector for a Chronic Implantable Atrial Tachyarrhythmia Monitor

Shantanu Sarkar; David E. Ritscher; Rahul Mehra

Continuous long-term monitoring of atrial fibrillation (AF) and tachycardia (AT) is an unmet clinical need, which could be met with a chronically-implanted monitor. Improved therapeutic decisions based on accurate monitoring of parameters, such as daily AF/AT burden (hours/ day) may lead to improvements in clinical outcomes such as reduction in hospitalizations, symptoms, and strokes. This paper describes an AF/AT detector that detects AF as well as AT with an irregular ventricular response, and a supplementary AT detector for AT with more regular ventricular response. Seven databases with significant durations of AF, AT, and sinus rhythm were used to evaluate the performance of the detectors. All patient records with AF (N = 124) were detected by the AF/AT detector to have AF/AT burden with a mean, median, and 75 percentile of absolute error in burden detection of 8.8, 0, and 4 min, respectively. In patients having AF burden (ges 10 min), the AF/AT detector was found to have burden accuracy within 20% of true burden in 96% of patients. The specificity was 94%, defined as follows: in patient records without AF/AT (N = 174), the percentage with AF/AT burden les10 min in the 24-h recordings. The AF/AT detector underestimates AT burden, thus degrading performance, in patients with significant amounts of AT with more regular ventricular response. The supplementary AT detector reduces the underestimation of AT while overestimating burden in patients without a significant amount of AT. The detectors described here could be implemented in an implantable monitor for accurate long-term AF/AT monitoring.


IEEE Engineering in Medicine and Biology Magazine | 2006

Management of atrial tachyarrhythmias

Rahul Mehra; Paul D. Ziegler; Shantanu Sarkar; David E. Ritscher; Eduardo N. Warman

The prevalence of cardiovascular diseases such as atrial tachyarrhythmias (ATa) has become prevalent worldwide. A discussion on the detection, monitoring, termination, and prevention of ATa is presented. Rhythm control is defined as maintenance of sinus rhythm. One measure of rhythm control is the percent of time spent in atrial tachyarrhythmias, commonly referred to as ATa burden. Rhythm control can be attempted with antiarrhythmic drugs, atrial ablation, or implantable devices. This paper gives attention to the management of ATa using implantable devices. Such devices must detect ATa accurately and either prevent them from recurring or terminate them by using electrical stimulation techniques


Archive | 2002

Algorithms for detecting atrial arrhythmias from discriminatory signatures of ventricular cycle lengths

David E. Ritscher; Shantanu Sarkar


Archive | 2006

Method and apparatus for detection of tachyarrhythmia using cycle lengths

Shantanu Sarkar; David E. Ritscher


Archive | 2003

Method for elimination of ventricular pro-arrhythmic effect caused by atrial therapy

David E. Ritscher; Jeffrey M. Gillberg; Mark L. Brown


Archive | 2004

Control of atrial defibrillation therapy based on hemodynamic sensor feedback

Douglas A. Hettrick; David E. Euler; Eduardo N. Warman; Michael R. Ujhelyi; Rahul Mehra; Paul D. Ziegler; Shailesh Kumar V. Musley; Charles E. Distad; David E. Ritscher


IEEE Engineering in Medicine and Biology Magazine | 2006

Management of atrial tachyarrhythmias. Rhythm control using implantable devices.

Rahul Mehra; Paul D. Ziegler; Shantanu Sarkar; David E. Ritscher; Eduardo N. Warman


Archive | 2001

Automated reapplication of atrial pacing therapies

Michael F. Hess; Rahul Mehra; Eduardo N. Warman; Nirav V. Sheth; Mark L. Brown; David E. Ritscher


Archive | 2008

Time based arrhythmia therapy efficacy criteria

Anne M. Gillis; Katherine H. Anderson; Douglas A. Hettrick; David E. Ritscher


Heart Rhythm | 2005

Reduction in atrial tachycardia duration in episodes treated with atrial ATP therapy

Shantanu Sarkar; Jodi Koehler; David E. Ritscher; Rahul Mehra

Collaboration


Dive into the David E. Ritscher's collaboration.

Top Co-Authors

Avatar

Rahul Mehra

SUNY Downstate Medical Center

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Douglas A. Hettrick

Medical College of Wisconsin

View shared research outputs
Top Co-Authors

Avatar

David E. Euler

Loyola University Medical Center

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge