Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Right bundle branch block as a cause of false-negative ECG classification of inferior myocardial infarction
Autore:
Gussak, I; Zhou, SH; Rautaharju, P; Bjerregaard, P; Stocke, K; Osada, N; Yokoyama, Y; Miller, M; Islam, S; Chaitman, BR;
Indirizzi:
St Louis Univ, Hlth Sci Ctr, Div Cardiol, St Louis, MO 63117 USA St Louis Univ St Louis MO USA 63117 , Div Cardiol, St Louis, MO 63117 USA Hewlett Packard Co, Cardiol Prod Div, Andover, MA USA Hewlett Packard Co Andover MA USA Co, Cardiol Prod Div, Andover, MA USA Wake Forest Univ, Sch Med, EPICARE Ctr, Winston Salem, NC USA Wake Forest Univ Winston Salem NC USA EPICARE Ctr, Winston Salem, NC USA
Titolo Testata:
JOURNAL OF ELECTROCARDIOLOGY
fascicolo: 3, volume: 32, anno: 1999,
pagine: 279 - 284
SICI:
0022-0736(199907)32:3<279:RBBBAA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Keywords:
right bundle branch block; inferior Q wave; serial ECG changes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Gussak, I St Louis Univ, Hlth Sci Ctr, Div Cardiol, 1034 S Brentwood Blvd,Suite 1550, St Louis, MO 63117 USA St Louis Univ 1034 S Brentwood Blvd,Suite 1550 St Louis MO USA 63117
Citazione:
I. Gussak et al., "Right bundle branch block as a cause of false-negative ECG classification of inferior myocardial infarction", J ELCARDIOL, 32(3), 1999, pp. 279-284

Abstract

It is generally accepted in clinical electrocardiography that a right bundle branch block (RBBB) does not interfere with the electrocardiographic (ECG) diagnosis of myocardial infarction (MI). The basic assumption is that the initial excitation wavefronts are relatively unchanged in RBBB. This study compared serial changes in Q wave duration in inferior leads II, III, andaVF in 9 patients who developed RBBB within 3 weeks after myocardial revascularization procedure (RBBB group) and in 41 revascularized patients without RBBB in the same observation period (control group). Q wave durations inthe electrocardiograms obtained before the patients' procedures were not significantly different between the study and control groups. However, Q wave durations shortened significantly more in the RBBB group than in the control group. The most pronounced Q wave duration shortening took place in lead aVF, -18.2 ms in the RBBB group versus -3.8 ms in the control group (P = .0001). The shortening was less pronounced, although significant, in leads II and III: II, -7.6 +/- -10.9 ms in the RBBB group vs -2.3 +/- -3.5 ms in the control group (P = .01); III, -11.3 +/- -10.5 ms vs -2.6 +/- -6.5 ms (P= .002); aVF, -18.2 +/- -13.5 ms vs -3.8 +/- -5.3 ms (P < .0001). It is concluded that incident RBBB complicating revascularization procedures may cause significant alterations in spatial orientation of the initial excitation wavefronts. This may be a potential source of false-negative ECG diagnosis of inferior MI, particularly in clinical trials where serial ECG analysisis an important part in MI classification.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 06:42:20