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  • Title: Electrocardiographic diagnosis of left atrial enlargement. Role of the P terminal force in lead V1.
    Author: Hopkins CB, Barrett O.
    Journal: J Electrocardiol; 1989 Oct; 22(4):359-63. PubMed ID: 2529337.
    Abstract:
    The ability of the electrocardiographic criterion, P terminal force in lead V1 (PTF-V1), to diagnosis left atrial enlargement (LAE) is evaluated in a group of 317 men. A left atrial index greater than 2.2 cm/m2, determined by echocardiography, is used as the standard for LAE. The value for this criterion of 0.04 mm-sec performs best, although there is no significant difference in percent correct diagnosis for values of PTF-V1 ranging from 0.03 to 0.09 mm-sec.
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