The clinical and electrocardiographic characteristic features of pulmonary embolism are discussed. Embolisms which run a course characteristic for multiple chronic embolizations (frequently the prodromes of massive embolisms) prove to be very difficult for diagnosing. The most stable electrocardiographic criteria are discovered within the right precordial leads (V1—V2). The negative tooth Tv1-2 is maintained for the longest time and renders possible the retrospective diagnosis. Though very seldom, pulmonary embolism might be manifested by the picture of posterior heart infarction in the standard leads, or else by the direct infarction image in V1.
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