TY - JOUR
T1 - T-wave changes secondary to left anterior hemiblock as shown by study of intermittent and alternating patterns
AU - Lasser, Richard P.
PY - 1976
Y1 - 1976
N2 - T-wave changes in spontaneous intermittent and alternating LAH have been described. Attention has been called to the fact that, with the onset of LAH conduction, the T-wave axis shifts oppositely to that of the QRS, thus widening the QRS-T angle in the frontal plane by about 95°. This has the effect of causing T-waves to become upright in leads II, III and AVF, even in those in whom T-waves were previously inverted. This described discordance of QRS and T-wave axes is considered as evidence that LAH conduction is in fact a true conduction abnormality. As a corollary, an inverted T-wave in leads II, III or AVF in the presence of LAH is a primary abnormality and may be an indication of inferior wall myocardial ischemia or infarction. T-waves are lowered but not inverted in lead I as a result of LAH conduction and precordial leads are variably but not significantly altered.
AB - T-wave changes in spontaneous intermittent and alternating LAH have been described. Attention has been called to the fact that, with the onset of LAH conduction, the T-wave axis shifts oppositely to that of the QRS, thus widening the QRS-T angle in the frontal plane by about 95°. This has the effect of causing T-waves to become upright in leads II, III and AVF, even in those in whom T-waves were previously inverted. This described discordance of QRS and T-wave axes is considered as evidence that LAH conduction is in fact a true conduction abnormality. As a corollary, an inverted T-wave in leads II, III or AVF in the presence of LAH is a primary abnormality and may be an indication of inferior wall myocardial ischemia or infarction. T-waves are lowered but not inverted in lead I as a result of LAH conduction and precordial leads are variably but not significantly altered.
UR - http://www.scopus.com/inward/record.url?scp=0017257882&partnerID=8YFLogxK
U2 - 10.1016/S0022-0736(76)80068-4
DO - 10.1016/S0022-0736(76)80068-4
M3 - Article
C2 - 1262773
AN - SCOPUS:0017257882
SN - 0022-0736
VL - 9
SP - 147
EP - 154
JO - Journal of Electrocardiology
JF - Journal of Electrocardiology
IS - 2
ER -