Trial reportEuropean journal of heart failure2013
Double dose vs. standard dose influenza vaccination in patients with heart failure: a pilot study.
Trial report in European journal of heart failure, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02787044 (INfluenza Vaccine to Effectively Stop Cardio Thoracic Events and Decompensated Heart Failure), which is not on this map. Cited by 19 papers, 4 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
INfluenza Vaccine to Effectively Stop Cardio Thoracic Events and Decompensated Heart Failure
Who cites it
19 citing papers in PubMed, 4 syntheses or guidelines pooled it, 32 citations in OpenAlex.
- The benefits of influenza vaccination in patients with cardiovascular disease: a systematic review and meta-analysis.Frontiers in pharmacology · 2025Pooled it
- Moving the Needle on Atherosclerotic Cardiovascular Disease and Heart Failure with Influenza Vaccination.Current atherosclerosis reports · 2021Pooled it
- The effect of influenza vaccination on mortality and hospitalization in patients with heart failure: a systematic review and meta-analysis.Heart failure reviews · 2019Pooled it
- Influenza vaccines for preventing cardiovascular disease.The Cochrane database of systematic reviews · 2015Pooled it
- High-dose vs. standard-dose inactivated influenza vaccine and cardiovascular outcomes in persons with or without pre-existing atherosclerotic cardiovascular disease: the DANFLU-2 trial.European heart journal · 2025Trial
- Association of post-vaccination adverse reactions after influenza vaccine with mortality and cardiopulmonary outcomes in patients with high-risk cardiovascular disease: the INVESTED trial.European journal of heart failure · 2023Trial
- Trial
- Influence of influenza vaccination on recurrent hospitalization in patients with heart failure.Herz · 2017Trial
- Vaccine Clinical Trials: Focus on Cardiovascular Disease.JACC. Advances · 2026Article
- Influenza vaccination in patients with heart failure: comprehensive review of evidence, challenges, and clinical implications.Heart failure reviews · 2026Review
- T Cell Response to Influenza Vaccination Remains Intact in Adults with Congenital Heart Disease Who Underwent Early Thymectomy.International journal of cardiology. Congenital heart disease · 2022Article
- Use of High-Dose Influenza and Live Attenuated Influenza Vaccines by US Primary Care Physicians.Journal of general internal medicine · 2021Article
- Influenza vaccination: a 'shot' at INVESTing in cardiovascular health.European heart journal · 2021Article
- Influenza Vaccination to Reduce Cardiovascular Morbidity and Mortality in Patients With COVID-19: JACC State-of-the-Art Review.Journal of the American College of Cardiology · 2020Review
- High-dose influenza vaccine to reduce clinical outcomes in high-risk cardiovascular patients: Rationale and design of the INVESTED trial.American heart journal · 2018Article
- Influenza infection and heart failure-vaccination may change heart failure prognosis?Heart failure reviews · 2017Review
- Can Vaccinations Improve Heart Failure Outcomes?: Contemporary Data and Future Directions.JACC. Heart failure · 2017Review
- Influenza Vaccination Reduces Hospitalization for Heart Failure in Elderly Patients with Chronic Kidney Disease: A Population-Based Cohort Study.Acta Cardiologica Sinica · 2016Article
- Lack of persistence of influenza vaccine antibody titers in patients with heart failure.Journal of cardiac failure · 2014Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
aimsInfluenza infection leads to increased morbidity and mortality in those with heart failure, and individuals with heart failure exhibit reduced antibody responses to influenza vaccine. We hypothesized that patients with heart failure randomized to double dose (DD) influenza vaccine will mount more vigorous humoral immune responses compared with those given standard dose (SD) vaccine. METHODS AND
resultsWe randomized 28 heart failure patients to DD (30 μg/strain) or SD (15 μg/strain) influenza vaccine. We assessed antibody production by haemagglutination inhibition assay (reported as log haemagglutination units) prior to, at 2-4 weeks and at 4-6 months following vaccination. Baseline antibody titres between DD (n = 12, mean age 64 ± 10 years) and SD (n = 16, mean age 63 ± 9 years) did not differ significantly. At 2-4 weeks, DD haemagglutination unit changes were significantly higher than those of SD (3.3 vs. 1.6 for A/H3N2, P < 0.001; 1.9 and 1.1 for A/H1N1, P = 0.009; and 1.7 and 1 for B-type, P = 0.02). At 4-6 weeks, there were no differences in titres in any of the virus types between treatment groups and, although titres decreased, levels remained above the seroprotective threshold.
conclusionsHigher influenza vaccine doses may elicit increased antibody-mediated responses in patients with heart failure; further studies should assess whether clinical outcomes are improved with this strategy.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.