Differentiating ischemic from non-ischemic T-wave inversion

Surgery – Diagnostic testing – Cardiovascular

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07925336

ABSTRACT:
A method of discriminating between ischemic and cardiac memory effects in a heart, comprising receiving electrocardiographic (ECG) data, calculating, from the ECG data, a direction of a T-wave vector, diagnosing ischemia if the T-wave vector is between about 75 degrees and about 200 degrees, and diagnosing cardiac memory if the T-wave vector is between about zero degrees and minus 90 degrees. Also presented is a system for discriminating between ischemic and cardiac memory effects in a heart comprising means for performing an electrocardiogram, means for calculating a direction of a T-wave vector, means for diagnosing ischemia if the T-wave vector is between about 90 degrees and 180 degrees, and means for diagnosing cardiac memory if the T-wave vector is between about zero degrees and minus 90 degrees.

REFERENCES:
patent: 5148812 (1992-09-01), Verrier et al.
patent: 5213106 (1993-05-01), Lerner
patent: 5456261 (1995-10-01), Luczyk
patent: 5803084 (1998-09-01), Olson
patent: 6128526 (2000-10-01), Stadler et al.
patent: 6171256 (2001-01-01), Joo et al.
patent: 6507753 (2003-01-01), Xue et al.
patent: 6865420 (2005-03-01), Kroll
patent: 7194299 (2007-03-01), Shvilkin et al.
patent: 7620449 (2009-11-01), Shvilkin et al.
patent: 2004/0064059 (2004-04-01), Samuelson et al.
patent: 2004/0111021 (2004-06-01), Olson
Okada, et al., “Clinical Implications of Isolated T Wave Inversion in Adults: Electrocardiographic Differentiation of the Underlying Causes of This Phenomenon,” Tokyo, Japan; JACC, vol. 24, No. 3, pp. 739-745 (Sep. 1944).
Yokuso{hacek over (g)}lu, et al., “Assessing the Cause of T Wave Inversion in Precordial Leads With ECG Mapping,” Journal of Electrocardiology, vol. 31, No. 2, pp. 125-132 (1998).
Takigawa, et al., “Significance of the Early Maximal Negative T Wave in Acute Anterior Myocardial Infarction,” J. Cardiol. 32(4), pp. 235-245 (1998).
Zimetbaum, et al., “Usefulness of ST-Segment Elevation in Lead III Exceeding That of Lead II for Identifying the Location of the Totally Occluded Coronary Artery in Inferior Wall Myocardial Infarction,” Brief Reports, pp. 918-919 (1998).
Shvilkin, et al., “Evolution and Resolution of Long-term Cardiac Memory,” Basic Science Reports, pp. 1810-1817 (May 12, 1998).
Gould, et al., “T-Wave Changes With Intermittent Left Bundle Branch Block,” Communications to the Editor Clinical Case Reports, Angiology 31(1), pp. 66-68 (Jan. 1980).
De Zwaan, et al., “Characteristic Electrocardiographic Pattern Indicating a Critical Stenosis High in Left Anterior Descending Coronary Artery in Patients Admitted Because of Impending Myocardial Infarction,” American Heart Journal, vol. 103, No. 4, part 2, pp. 730-736 (Apr. 1982).
Rosenbaum, et al., “Electrotonic Modulation of the T Wave and Cardiac Memory,” The American Journal of Cardiology, vol. 50, No. 2, pp. 213-222 (Aug. 1982).
Nakajima, et al., “The Deeper the Negativity of the T Waves Recorded, the Greater Is The Effectiveness of Reperfusion of the Myocardium,” Cardiology 87:91-97 (1996).
Plotnikov, et al., “Role of L-Type Calcium Channels in Pacing-Induced Short-Term and Long-Term Cardiac Memory in Canine Heart,” Circulation, pp. 2844-2849 (Jun. 10, 2003).
Plotnikov, et al., “Interactions Between Antiarrhythmic Drugs and Cardiac Memory,” Cardiovascular Research 50: 335-344 (2001).
Sasaki, et al., “Relation of ST-Segment Changes in Inferior Leads During Anterior Wall Acute Myocardial Infarction to Length and Occlusion Site of the Left Anterior Descending Coronary Artery,” The American Journal of Cardiology, vol. 87, pp. 1340-1345 (Jun. 15, 2001).
Gould, et al., “Pacemaker-Induced Electrocardiographic Changes Simulating Myocardial Infarction,” Chest, vol. 63, No. 5, pp. 829-832 (May 1973).
Herweg, et al., “Cardiac Memory After Radiofrequency Ablation of Accessory Pathways: The Post-ablation T Wave Does Not Forget the Pre-excited QRS,” Journal of Interventional Cardiac Electrophysiology, vol. 3, No. 3, pp. 263-272 (1999).
Chatterjee, et al., “Electrocardiographic Changes Subsequent to Artificial Ventricular Depolarization,” Brit. Heart J., 31:770-779 (1969).
De Zwaan, et al., “Angiographic and Clinical Characteristics of Patients With Unstable Angina Showing an ECG Pattern Indicating Critical Narrowing of the Proximal LAD Coronary Artery,” Am. Heart J., 117:657-665 (Mar. 1989).
Hayden, et al., “Electrocardiographic T-wave Inversion: Differential Diagnosis in the Chest Pain Patient,” Am. J. Emerg. Med., 20:252-262 (May 2002).
International Search Report from the United States Patent and Trademark Office for International Application No. PCT/US2005/17163, dated Aug. 22, 2006.
Written Opinion from the United States Patent and Trademark Office for International Application No. PCT/US2005/17163, dated Aug. 22, 2006.
Supplementary Partial European Search Report from the European Patent Office for European Application No. EP 05 75 0555, dated Aug. 2, 2010.
Shvilkin et al., “T Wave frontal plane direction differentiates precordial post-pacing from ischemic T wave inversions,”Heart Rhythm1:1 S163-S164, XP007914094 (May Supplement 2004).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Differentiating ischemic from non-ischemic T-wave inversion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Differentiating ischemic from non-ischemic T-wave inversion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differentiating ischemic from non-ischemic T-wave inversion will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2644534

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.