ECG mean-power as primary indicator of myocardial ischemia

Author

Gutiérrez, A. ; Hernández, PR ; Pastelín, G.

Author_Institution

CINVESTAV (Bioelectronica), San Pedro Zacatenco, Mexico

fYear

2001

fDate

2001

Firstpage

369

Lastpage

372

Abstract

In order to cause myocardial ischemia, the left anterior descending (LAD) branch of the coronary artery was occluded and released twice in five dogs. The occlusion-release times and the ECG was recorded. Using an epicardial lead in the necrosis zone for each dog, spectrograms were obtained. The spectrograms showed great changes related to the perfusion status in the lowand high-frequency regions. As a numerical indicator, for each recorded lead, the normalized mean power was calculated for both the low-frequency region (1-10 Hz) and the high-frequency region (30-100 Hz). As a cardiac ischemia indicator, the normalized low-frequency mean-power (LFMP) plot was obtained. When the coronary occlusion begins and then remains, this graphic plot shows an increase in the LFMP, whereas coronary releasing causes the recovery of the initial LFMP level

Keywords

diagrams; electrocardiography; haemorheology; ECG; cardiac ischemia indicator; coronary artery; coronary occlusion; coronary releasing; dogs; epicardial lead; graphic plot; high-frequency region; left anterior descending branch; low-frequency mean power; myocardial ischemia; necrosis zone; occlusion-release times; perfusion status; spectrograms; Arteries; Continuous wavelet transforms; Dogs; Electrocardiography; Frequency; Heart rate variability; Ischemic pain; Monitoring; Myocardium; Spectrogram;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 2001

Conference_Location

Rotterdam

ISSN

0276-6547

Print_ISBN

0-7803-7266-2

Type

conf

DOI

10.1109/CIC.2001.977669

Filename

977669