SPATIAL VELOCITY ELECTROCARDIOGRAM OF THE P WAVE IN NORMAL SUBJECTS
نویسندگان
چکیده
منابع مشابه
Wave amplitude relationships in the normal electrocardiogram.
The characteristics ofthe standard 12-lead electrocardiogram have been determined by studies based on large numbers of apparently normal subjects (Kossmann and Johnston, 1935; Myers et al., 1947; Sokolow and Friedlander, 1949; Hiss, Lamb, and Allen, 1960). Means, standard deviations, and percentile distributions have been calculated for all waves. Relationships between amplitudes of waves appea...
متن کامل[The P wave, P-R interval, and Q-T ratio of the normal orthogonal electrocardiogram].
E LECTRIC signals generated from the heart are more properly defined in mag. n-itude and direction by an orthogomial 3 lead system with constancy iii lead direction and strenogth.l1The spatial heart veetors are projected on the 3 perpendicular axes of such a Cartesiani coordiiiate system, and are readily available for analysis. With the advent of corrected orthogonal lead systems1-4 it appeared...
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During voluntary hyperventilation in unanesthetized humans, hypocapnia causes coronary vasoconstriction and decreased oxygen (O(2)) supply and availability to the heart. This can induce local epicardial coronary artery spasm in susceptible patients. Its diagnostic potential for detection of early heart disease is unclear. This is because such hypocapnia produces an inconsistent and irreproducib...
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according to research, academic self-concept and academic achievement are mutually interdependent. in the present study, the aim was to determine the relationship between the academic self-concept and the academic achievement of students in english as a foreign language and general subjects. the participants were 320 students studying in 4th grade of high school in three cities of noor, nowshah...
Effect of Hypertension on the P Wave of the Electrocardiogram.
The P wave of the electrocardiogram has been investigated in great detail in normal subjects (Shipley and Hallaran, 1936; Graybiel et al., 1944; Stewart and Manning, 1944; Thomas and Dejong, 1954) and in various types of cardiac disease (Wood and Selzer, 1939; Thomas and Dejong, 1954; Martins de Oliveira and Zimmerman, 1959). There have been few studies of the P wave in hypertension, however, a...
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ژورنال
عنوان ژورنال: Japanese Circulation Journal
سال: 1973
ISSN: 0047-1828,1347-4839
DOI: 10.1253/jcj.37.797