…In adults over 40 years of age, atherosclerosis is the predominant cause. Other mechanisms include thrombosis, embolism, vasculitis, fibromuscular dysplasia, arterial entrapment, cystic adventitial disease…
…required in the S wave or R wave. Fragmented QRS complexes are indications of previous myocardial infarction. There are imaging studies demonstrating that QRS fragmentation…
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