The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.
Impact of QRS Duration on Clinical Event Reduction With Cardiac Resynchronization Therapy: Meta-analysis of Randomized Controlled Trials
Abstract
BACKGROUND: Cardiac resynchronization therapy (CRT) is effective in reducing clinical events in patients with heart failure and prolonged QRS interval. Studies using surrogate measures and subgroup analysis of large trials suggest that only patients with severely prolonged QRS benefit from CRT. Our objective was to determine whether the effect of CRT on adverse clinical events (eg, death, hospitalizations) is different in patients with moderately (ie, 120 to 149 milliseconds) [corrected] vs severely (ie, ≥150 milliseconds) prolonged QRS duration. METHODS: Searches of MEDLINE, SCOPUS, and Cochrane databases were conducted for randomized controlled CRT trials. Trials reporting clinical events according to different QRS ranges were identified. Five randomized trials fulfilling the inclusion criteria (total patients, n = 5813) were included in the meta-analysis. RESULTS: In patients with severely prolonged QRS, there was a reduction in composite clinical events with CRT (risk ratio, 0.60; 95% confidence interval [CI], 0.53-0.67) (P < .001). In contrast, there was no benefit of CRT in patients with moderately prolonged QRS (RR, 0.95; 95% CI, 0.82-1.10) (P = .49), resulting in a significantly different impact of CRT in the 2 QRS groups (P < .001). There was a significant relationship between baseline QRS duration and risk ratio (P < .001) with benefit of CRT appearing at a QRS of approximately 150 milliseconds and above. The differential response of the 2 QRS groups was evident for all New York Heart Association classes. CONCLUSIONS: Cardiac resynchronization therapy was effective in reducing adverse clinical events in patients with heart failure and a baseline QRS interval of 150 milliseconds or greater, but CRT did not reduce events in patients with a QRS of less than 150 milliseconds. These findings have implications for the selection of patients for CRT.
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Operating characteristics of a rank correlation test for publication bias
Begg, C. B., & Mazumdar, M. (1994) · Biometrics · doi:10.2307/2533446 · Cited by 16,955
Bristow, M. R., Saxon, L. A., Boehmer, J., Krueger, S., Kass, D. A., De Marco, T., Carson, P., DiCarlo, L., DeMets, D., White, B. G., et al. (2004) · New England Journal of Medicine · doi:10.1056/nejmoa032423 · Cited by 5,812
Heart Disease and Stroke Statistics—2010 Update: A Report From the American Heart Association
WRITING GROUP MEMBERS, Lloyd-Jones, D., Adams, R. J., Brown, T. M., Carnethon, M., Dai, S., De Simone, G., Ferguson, T. B., Ford, E., Furie, K., et al. (2010) · Circulation · doi:10.1161/circulationaha.109.192667 · Cited by 5,700
Cardiac Resynchronization in Chronic Heart Failure
Abraham, W. T., Fisher, W. G., Smith, A. L., Delurgio, D. B., Leon, A. R., Loh, E., Kocovic, D. Z., Packer, M., Clavell, A. L., Hayes, D. L., et al. (2002) · New England Journal of Medicine · doi:10.1056/nejmoa013168 · Cited by 4,648
Cardiac-Resynchronization Therapy for the Prevention of Heart-Failure Events
Moss, A. J., Hall, W. J., Cannom, D. S., Klein, H., Brown, M. W., Daubert, J. P., Estes, N. A. M., Foster, E., Greenberg, H., Higgins, S. L., et al. (2009) · New England Journal of Medicine · doi:10.1056/nejmoa0906431 · Cited by 3,157
ACC/AHA/HRS 2008 guidelines for device-based therapy of cardiac rhythm abnormalities
Epstein, A. E., DiMarco, J. P., Ellenbogen, K. A., Estes, N. A. M., Freedman, R. A., Gettes, L. S., Gillinov, A. M., Gregoratos, G., Hammill, S. C., Hayes, D. L., et al. (2008) · Journal of the American College of Cardiology · doi:10.1016/j.jacc.2008.02.032 · Cited by 2,546
Cardiac-Resynchronization Therapy for Mild-to-Moderate Heart Failure
Tang, A. S. L., Wells, G. A., Talajic, M., Arnold, M. O., Sheldon, R., Connolly, S., Hohnloser, S. H., Nichol, G., Birnie, D. H., Sapp, J. L., et al. (2010) · New England Journal of Medicine · doi:10.1056/nejmoa1009540 · Cited by 1,859
Collaborative care for patients with depression and chronic illnesses
Katon, W. J., Lin, E. H. B., Von Korff, M., Ciechanowski, P., Ludman, E. J., Young, B., Peterson, D., Rutter, C. M., McGregor, M., & McCulloch, D. (2010) · New England Journal of Medicine · doi:10.1056/nejmoa1003955 · Cited by 1,697
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2013 ACCF/AHA Guideline for the Management of Heart Failure
Yancy, C. W., Jessup, M., Bozkurt, B., Butler, J., Casey, D. E., Drazner, M. H., Fonarow, G. C., Geraci, S. A., Horwich, T., Januzzi, J. L., et al. (2013) · Journal of the American College of Cardiology · doi:10.1016/j.jacc.2013.05.019 · Cited by 12,536
Priori, S. G., Blomström-Lundqvist, C., Mazzanti, A., Blom, N., Borggrefe, M., Camm, J., Elliott, P. M., Fitzsimons, D., Hatala, R., Hindricks, G., et al. (2015) · European Heart Journal · doi:10.1093/eurheartj/ehv316 · Cited by 3,893
Yancy, C. W., Jessup, M., Bozkurt, B., Butler, J., Casey, D. E., Drazner, M. H., Fonarow, G. C., Geraci, S. A., Horwich, T., Januzzi, J. L., et al. (2013) · Circulation · doi:10.1161/cir.0b013e31829e8776 · Cited by 2,106
2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy
Glikson, M., Nielsen, J. C., Kronborg, M. B., Michowitz, Y., Auricchio, A., Barbash, I. M., Barrabés, J. A., Boriani, G., Braunschweig, F., Brignole, M., et al. (2021) · European Heart Journal · doi:10.1093/eurheartj/ehab364 · Cited by 2,019
Cardiac-Resynchronization Therapy in Heart Failure with a Narrow QRS Complex
Ruschitzka, F., Abraham, W. T., Singh, J. P., Bax, J. J., Borer, J. S., Brugada, J., Dickstein, K., Ford, I., Gorcsan, J., Gras, D., et al. (2013) · New England Journal of Medicine · doi:10.1056/nejmoa1306687 · Cited by 825
Metadata
- Authors
- Sipahi, I.
- Venue
- Archives of Internal Medicine
- Publisher
- American Medical Association (AMA)
- Published
- 2011-09-12
- Volume
- 171
- Issue
- 16
- Pages
- 1454
- ISSN
- 0003-9926 (ISSN-L)
- OpenAlex
- W2112369523
- Cited by
- 295
- References
- 8
- FWCI
- 26.45
- Type
- journal article
- Language
- en
- Open access
- closed
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