Abstract
Several studies have shown that the beat-to-beat variability of ventricular repolarization, which can be computed by T-wave spectral variance (TSV) index, constitutes a marker of cardiac risk. Moreover, the fact that properties of action potential duration are altered during the healing (days, weeks) and healed (months) infarct stages, have been reported. However, no data exist regarding the influence of the time elapsed after myocardial infarction (MI) on modulation of the beat-to-beat ventricular repolarization variability. In the present work we have evaluated TSV index during healing and healed stages of MI using 12 standard ECG leads. The ECG of control or healthy subjects (n = 49) and the ECGs in patients after MI (n = 38), one within the first seven days (MI7) and the other after 60 days (MI60) of cardiac infarction, have been analyzed. We have considered the preferential ECG leads as those leads in which TSV index have presented a relative change greater than 10 in MI7 respect to control. Results indicate that TSV index have shown a significant increase (p < 0.0005) in I, II, aVR, aVF, V3, V4, V5 and V6 leads in healing phase of MI (MI7) with respect to control. Further, in the healed phase of MI (MI60), the TSV index t...Continue Reading
References
Jun 1, 1978·Circulation·P J Schwartz, S Wolf
Sep 15, 1991·The American Journal of Cardiology·S A Ben-HaimY Palti
Mar 1, 1985·Circulation Research·P C UrsellA L Wit
Mar 1, 1985·IEEE Transactions on Bio-medical Engineering·J Pan, W J Tompkins
Oct 1, 1984·Circulation·M E Josephson, A L Wit
Nov 15, 1995·Circulation·A J MossM H Lehmann
Sep 1, 1996·Circulation Research·D QinN el-Sherif
Oct 7, 1997·Circulation·R D BergerG F Tomaselli
Oct 26, 1999·Cardiovascular Research·J M Pinto, P A Boyden
Jun 14, 2000·Circulation·A L GoldbergerH E Stanley
Mar 6, 2002·Circulation·Markus ZabelMichael R Franz
Nov 15, 2002·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Esteban Raúl ValverdeMarcelo Oscar Biagetti
Feb 7, 2004·Pacing and Clinical Electrophysiology : PACE·Peter SteinbiglerGerhard Steinbeck
Apr 10, 2004·IEEE Transactions on Bio-medical Engineering·Juan Pablo MartínezPablo Laguna
Nov 15, 2006·European Heart Journal·Gianfranco PiccirilloFrancesco Barillà
May 30, 2009·Scandinavian Cardiovascular Journal : SCJ·Miia K Hyytinen-OinasJuha S Perkiömäki
Jun 19, 2009·The Canadian Journal of Cardiology·Derek Exner
Oct 6, 2009·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Robert J Myerburg
Apr 21, 2010·Circulation·David J Callans
May 7, 2013·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Farzad VahediLennart Bergfeldt
Dec 1, 2011·Therapeutic Advances in Drug Safety·Larisa G Tereshchenko, Ronald D Berger
Citations
Mar 5, 2016·Journal of Electrocardiology·Lennart Bergfeldt
Sep 8, 2016·Journal of Electrocardiology·Jan Němec
Jun 21, 2019·Heart and Vessels·Xingmei HuangXiangjun Yang