2007, Number 2
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Arch Cardiol Mex 2007; 77 (2)
On the diagnostic value of indirect electrocadiographic signs of left posterolateral basal infarction
Micheli A, Aranda A, Medrano GA
Language: Spanish
References: 10
Page: 150-155
PDF size: 172.56 Kb.
ABSTRACT
The left basal posterolateral infarct does not give pathological Q waves nor ventricular QS complexes in the low lateral leads V
5 and V
6. For that, the increased voltage of R waves in the lead V
2 and or transitional leads V
3 and V
4, constitutes only an indirect sign of the presence of dead myocardium in the left posterolateral basal regions. Naturally, in these cases, a differential diagnosis with left ventricular or biventricular hypertrophy is mandatory. Therefore it is suitable to register left posterior thoracic leads V
7–V
9 or, preferably, a complete thoracic circle. We present here three examples: two experimental and another clinical, in which the electrocardiographic findings corresponded to anatomical data of a left posterolateral basal infarction. This fact speaks for a no absolute but relative diagnostic value of the indirect electrocardiographic signs of altered ventricular depolarization and repolarization in the left posterolateral basal regions of the left ventricle.
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