PMID: 696636Oct 1, 1978Paper

Significance of left axis deviation in patients with chronic left bundle branch block

The American Journal of Cardiology
R C DhingraK M Rosen

Abstract

Forty-nine patients with chronic left bundle branch block and a normal frontal axis were compared with 53 patients with left bundle branch block and left axis deviation. The following clinical variables were more frequent (P less than 0.05) in patients with left axis deviation: greater age, exertional angina, congestive heart failure, cardiomegaly, cardiac functional class II to IV, coronary artery disease and presence of organic heart disease. Absence of organic heart disease (primary conduction disease) was seen only in patients with a normal axis. Patients with left axis deviation had longer (P less than 0.05) mean P-R, A-H and H-V intervals and atrial and atrioventricular (A-V) nodal effective refractory periods. All patients were prospectifely followed up for 30 to 2,271 days with a mean +/- standard error of the mean follo-up period of 538 +/- 72 for the group with a normal axis and 604 +/- 72 days for the group with left axis deviation (difference not significant). A-V block developed in three patients (6 percent) with left axis deviation and in none of those with a normal axis. The cumulative 4 year mortality rate for the entire group approached 75 percent. The patients with left axis deviation had greater cardiovascula...Continue Reading

References

Aug 1, 1977·Archives of Internal Medicine·P DenesK M Rosen
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Mar 1, 1975·Circulation·M Rotman, J H Triebwasser
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Citations

Mar 1, 1987·Journal of the American College of Cardiology·N C Flowers
Feb 1, 1980·British Heart Journal·S W RabkinR B Tate
Feb 1, 1980·British Heart Journal·R W ZmyslinskiT Akiyama
May 1, 1981·British Heart Journal·P A BarrettW J Mandel
Sep 26, 2013·Arquivos brasileiros de cardiologia·Rodrigo Bellio de Mattos BarrettoAmanda Guerra Moraes Rego Sousa
Nov 1, 1983·The American Journal of Cardiology·A Gressard
Aug 1, 1979·The American Journal of Cardiology·E LichsteinK D Chadda
May 1, 1985·The American Journal of Cardiology·J F SchneiderW B Kannel
May 7, 2013·The American Journal of Cardiology·Parin J Patel, Ralph J Verdino
Dec 8, 2015·Journal of Cardiovascular Electrophysiology·Laura PerrottaLuigi Padeletti
Apr 1, 1980·Circulation·C R WyndhamK M Rosen
Jul 1, 1981·Pacing and Clinical Electrophysiology : PACE·H G Mond
Sep 1, 1983·Pacing and Clinical Electrophysiology : PACE·C R Wyndham
Apr 9, 2021·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Saer Abu-AlrubSylvain Ploux

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