LVH is characterised by an increase in the amplitude of R and S waves, rather than axis deviation or Q waves. The association of diminished QRS complexes with increased left ventricular mass is highly suggestive of a diagnosis of cardiac amyloidosis with atrial arrhythmia, most often atrial fibrillation, as an additional element whose specificity appears to be good, Q waves or QS complexes due to increased potential
Myocardial necrosis of considerable extent can reduce the muscle mass, which is responsible for generating electrical potential, and thus, Q waves or pathological QS complexes may appear, whose localisation depends on the territory affected. Section snippets Q waves and QS complexes due to loss of potential
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