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[Differential diagnosis of the deviation of the QRS left axis in ECG]
Schweizerische Medizinische Wochenschrift
|November 6, 1976
Insights
This study analyzed 100 ECGs for left anterior fascicular block (LAFB) in patients with left axis deviation. A new criterion improved LAFB diagnosis in doubtful cases, enhancing accuracy in electrocardiogram interpretation.
Area of Science:
- Cardiology
- Electrocardiography
- Medical Diagnostics
Abstract:
100 ECGs with left axis deviation have been analyzed with respect to left anterior fascicular block (LAFB). On the basis of conventional criteria LAFB was diagnosed in 59 cases, but could be rules out in 26. Of the remaining 15 ECGs which at first seemed doubtful, 4 were identified as LAFB on the basis of a new criterion: duration of qR in a VL at least 40 msec longer than in V6.