T-wave changes secondary to left anterior hemiblock as shown by study of intermittent and alternating patterns
| Autor: | Richard P. Lasser |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
medicine.medical_specialty
Myocardial ischemia medicine.diagnostic_test Heart block business.industry Infarction Coronary Disease medicine.disease Electrocardiography QRS complex Dogs Heart Block Internal medicine Coronal plane medicine Cardiology Animals Humans Left anterior hemiblock cardiovascular diseases Abnormality Cardiology and Cardiovascular Medicine business |
| Zdroj: | Journal of Electrocardiology. 9:147-154 |
| ISSN: | 0022-0736 |
| DOI: | 10.1016/s0022-0736(76)80068-4 |
| Popis: | 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 degrees. 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 dicordance 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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