THE "Q" DEFLECTION IN NORMAL AND ABNORMAL HUMAN ELECTROCARDIOGRAMS
Authors: Charles Shookhoff, Albert H. Douglas
Journal: Annals of Internal Medicine (1934)

Article1 August 1934THE "Q" DEFLECTION IN NORMAL AND ABNORMAL HUMAN ELECTROCARDIOGRAMSCHARLES SHOOKHOFF, M.D., ALBERT H. DOUGLAS, M.D.CHARLES SHOOKHOFF, M.D.Search for more papers by this author, ALBERT H. DOUGLAS, M.D.Search for more papers by this authorAuthor, Article, and Disclosure Informationhttps://doi.org/10.7326/0003-4819-8-2-177 SectionsAboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinkedInRedditEmail ExcerptSince Pardee,1in 1930, re-directed attention to the Q-wave and reported a relative frequency of large Q3's, in cases that showed coronary artery disease, there has been an increased effort directed toward the determination of the significance of Q and, more particularly, of a large Q3. All such work in the Q-wave has been based on the assumption that the term Q, or Q3, designates a more or less definite part of the electrocardiogram, and that it probably refers to the activation of a fairly definite part of the heart. In this paper we shall attempt an analysis of the...Bibliography1. PARDEE HE: Significance of electrocardiogram with large Q in Lead III, Arch. Int. Med., 1930, xlvi, 470-481. CrossrefGoogle Scholar2. LEWIS T: Mechanism and graphic registration of the heart beat, 1920, Paul B. Hoeber, New York, p. 108. Google Scholar3. WILSONMACLEODBARKER FNAGPS: Interpretation of initial deflections of ventricular complex of electrocardiogram, Am. Heart Jr., 1931, vi, 637-664. CrossrefGoogle Scholar4. LEWIS T: The spread of the excitatory process to the vertebrate heart, Phil. Trans. Roy. Soc., London, 1916, 207-221. Google Scholar5. FENICHELKUGELL NMVH: Large Q-wave of electrocardiogram. Correlation with pathological observations, Am. Heart Jr., 1931, vii, 235-248. CrossrefGoogle Scholar6. CARRHAMILTONPALMER FBBERS: Significance of large Q in Lead III of electrocardiogram during pregnancy, Am. Heart Jr., 1933, viii, 519-524. CrossrefGoogle Scholar7. MEEKWILSON WJA: Effect of changes in position of heart on Q-R-S complex of electrocardiogram, Arch. Int. Med., 1925, xxxvi, 614-627. CrossrefGoogle Scholar8. WILSON FN: Electrocardiogram in myocardial infarction with particular reference to initial deflections of ventricular complex, Heart, 1933, xvi, 193, 155-177. Google Scholar9. ZISKIN T: Clinical significance of electrocardiograms with large Q waves in Lead III, Arch. Int. Med., 1932, l, 435-442. CrossrefGoogle Scholar10. WILLIUS FA: Occurrence and significance of electrocardiograms displaying large Q waves in Lead III, Am. Heart Jr., 1931, vi, 723-729. CrossrefGoogle Scholar11. STRAUSSFELDMAN SL: Significance of large Q wave in Lead III, Am. Jr. Med. Sci., 1933, clxxxv, 87-92. CrossrefGoogle Scholar12. KRUMBHAARJENKS EBHH: Electrocardiographic studies in normal infants and children, Heart, 1917, vi, 189-196. Google Scholar13. SEHAM M: Electrocardiogram in normal children, Am. Jr. Dis. Child., 1921, xxi, 247. Google Scholar14. SHOOKHOFFDOUGLAS CAH: Case of acute coronary occlusion with roentgenographic evidence of early development of aneurysm of left ventricle, Am. Heart Jr., 1931, vii, 95-100. CrossrefGoogle Scholar15. SHOOKHOFFDOUGLAS CAH: Inversion of the P-wave in the third lead of electrocardiograms with a large Q3 wave, Proc. Soc. Exper. Biol. and Med., 1934, xxxi, 757-760. CrossrefGoogle Scholar This content is PDF only. To continue reading please click on the PDF icon. Author, Article, and Disclosure InformationAffiliations: Brooklyn, New York*Received for publication May 7, 1934.From the Division of Cardiology, "B" Medical Services, the Jewish Hospital of Brooklyn. PreviousarticleNextarticle Advertisement FiguresReferencesRelatedDetails Metrics Cited byThe Q3 and QS3 deflections in the electrocardiogram: Criteria and significanceExperimentelle Untersuchungen über die Entstehung des Infarktbildes im Extremitäten-EKGA study of the QRS complex of Lead III in left axis deviation 1 August 1934Volume 8, Issue 2Page: 177-191KeywordsCoronary heart diseaseElectrocardiographyMedical servicesStable coronary artery disease ePublished: 1 December 2008 Issue Published: 1 August 1934 PDF downloadLoading ...