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Determination of Lead III Q Waves Significance: Utility of Deep Inspiration

Determination of Lead III Q Waves Significance: Utility of Deep Inspiration Abstract The relative clinical significance of lead III Q waves and the effect of inspiration has received added impetus after the finding that Q waves have predictive value for coronary artery disease and asynergy. We studied the effect of deep inspiration on Q waves in leads III and aVF in 31 patients and correlated it with the findings at cardiac catheterization. We found that phasic respiration can alter Q-wave duration significantly in leads III and aVF, regardless of the presence or absence of significant associated coronary artery disease and asynergy, and is therefore of no clinical value in this regard. (Arch Intern Med 137:437-439, 1977) References 1. Bodenheimer MM, Banka VS, Helfant RH: Q waves and ventricular asynergy: Predictive value and hemodynamic significance of anatomic localization . Am J Cardiol 35:615-619, 1975.Crossref 2. Proudfit WL, Shirey EK, Sones FM: Selective cine coronary arteriography: Correlation with clinical findings in 1000 patients . Circulation 33:901-910, 1966.Crossref 3. Williams RA, Cohn PF, Vokonas PS: Electrocardiographic, arteriographic and ventriculographic correlations in transmural myocardial infarction . Am J Cardiol 31:595, 1973.Crossref 4. Pardee HEB: Significance of electrocardiography with large Q in lead III . Arch Intern Med 46:470, 1930.Crossref 5. Massie E, Walsh TJ: Clinical Vectorcardiography and Electrocardiography . Chicago, Year Book Medical Publishers, 1960, pp 289-293. 6. Weisbart MH, Simonson E: The diagnostic accuracy of Q3 and related electrocardiographic items for the detection of patients with posterior wall myocardial infarction . Am Heart J 50:62, 1955.Crossref 7. Myers GB, Klein HA, Hiratzka T: Correlation of electrocardiographic and pathologic findings in posterior infarction . Am Heart J 38:547, 1948.Crossref 8. Lipman BS, Massie E, Kleiger RE: Clinical Scalar Electrocardiography , ed 6. Chicago, Year Book Medical Publishers, 1972, p 201. 9. Friedberg CK: Diseases of the Heart . Philadelphia, WB Saunders Co, 1966, p 38. 10. Marriott HJL: Practical Electrocardiography , ed 5. Baltimore, Williams & Wilkins, 1972, p 231. 11. Luisada AA, Slodki SA: The Differential Diagnosis of Cardiovascular Diseases . New York, Grune & Stratton, Inc, 1965, p 159. 12. Lyle AM: Further observations on the deep Q3 of the electrocardiogram . Am Heart J 28:199, 1944.Crossref 13. Evans W: The effect of deep inbreathing on lead III of the electrocardiogram . Br Heart J 13:457-466, 1951.Crossref 14. Shettigar UR, Hultgren HN, Pfeifer JF, et al: Diagnostic value of Q waves in inferior myocardial infarction . Am Heart J 88:170-175, 1974.Crossref 15. Massie E, Walsh TJ: Clinical Vectorcardiography and Echocardiography . Chicago, Year Book Medical Publishers, 1960, pp 36-42. 16. Beckwith JR: Grant's Clinical Electrocardiography . New York, McGraw Hill Book Co Inc, 1970, pp 1-46. 17. Johnston FD, Hill IG, Wilson FN: The form of the electrocardiogram in experimental myocardial infarction . Am Heart J 10:1025, 1935.Crossref http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Internal Medicine American Medical Association

Determination of Lead III Q Waves Significance: Utility of Deep Inspiration

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Publisher
American Medical Association
Copyright
Copyright © 1977 American Medical Association. All Rights Reserved.
ISSN
0003-9926
eISSN
1538-3679
DOI
10.1001/archinte.1977.03630160011006
Publisher site
See Article on Publisher Site

Abstract

Abstract The relative clinical significance of lead III Q waves and the effect of inspiration has received added impetus after the finding that Q waves have predictive value for coronary artery disease and asynergy. We studied the effect of deep inspiration on Q waves in leads III and aVF in 31 patients and correlated it with the findings at cardiac catheterization. We found that phasic respiration can alter Q-wave duration significantly in leads III and aVF, regardless of the presence or absence of significant associated coronary artery disease and asynergy, and is therefore of no clinical value in this regard. (Arch Intern Med 137:437-439, 1977) References 1. Bodenheimer MM, Banka VS, Helfant RH: Q waves and ventricular asynergy: Predictive value and hemodynamic significance of anatomic localization . Am J Cardiol 35:615-619, 1975.Crossref 2. Proudfit WL, Shirey EK, Sones FM: Selective cine coronary arteriography: Correlation with clinical findings in 1000 patients . Circulation 33:901-910, 1966.Crossref 3. Williams RA, Cohn PF, Vokonas PS: Electrocardiographic, arteriographic and ventriculographic correlations in transmural myocardial infarction . Am J Cardiol 31:595, 1973.Crossref 4. Pardee HEB: Significance of electrocardiography with large Q in lead III . Arch Intern Med 46:470, 1930.Crossref 5. Massie E, Walsh TJ: Clinical Vectorcardiography and Electrocardiography . Chicago, Year Book Medical Publishers, 1960, pp 289-293. 6. Weisbart MH, Simonson E: The diagnostic accuracy of Q3 and related electrocardiographic items for the detection of patients with posterior wall myocardial infarction . Am Heart J 50:62, 1955.Crossref 7. Myers GB, Klein HA, Hiratzka T: Correlation of electrocardiographic and pathologic findings in posterior infarction . Am Heart J 38:547, 1948.Crossref 8. Lipman BS, Massie E, Kleiger RE: Clinical Scalar Electrocardiography , ed 6. Chicago, Year Book Medical Publishers, 1972, p 201. 9. Friedberg CK: Diseases of the Heart . Philadelphia, WB Saunders Co, 1966, p 38. 10. Marriott HJL: Practical Electrocardiography , ed 5. Baltimore, Williams & Wilkins, 1972, p 231. 11. Luisada AA, Slodki SA: The Differential Diagnosis of Cardiovascular Diseases . New York, Grune & Stratton, Inc, 1965, p 159. 12. Lyle AM: Further observations on the deep Q3 of the electrocardiogram . Am Heart J 28:199, 1944.Crossref 13. Evans W: The effect of deep inbreathing on lead III of the electrocardiogram . Br Heart J 13:457-466, 1951.Crossref 14. Shettigar UR, Hultgren HN, Pfeifer JF, et al: Diagnostic value of Q waves in inferior myocardial infarction . Am Heart J 88:170-175, 1974.Crossref 15. Massie E, Walsh TJ: Clinical Vectorcardiography and Echocardiography . Chicago, Year Book Medical Publishers, 1960, pp 36-42. 16. Beckwith JR: Grant's Clinical Electrocardiography . New York, McGraw Hill Book Co Inc, 1970, pp 1-46. 17. Johnston FD, Hill IG, Wilson FN: The form of the electrocardiogram in experimental myocardial infarction . Am Heart J 10:1025, 1935.Crossref

Journal

Archives of Internal MedicineAmerican Medical Association

Published: Apr 1, 1977

References