Related Experiment Video
Updated: Jan 26, 2026
Fundus Photography as a Convenient Tool to Study Microvascular Responses to Cardiovascular Disease Risk Factors in Epidemiological Studies
Published on: October 22, 2014
Selectivity of beta-blockers, cardiovascular and all-cause mortality in people with hypoglycaemia: An observational
F Zaccardi1, L L Nystrup Husemoen2, B L Thorsted2
1Diabetes Research Centre, University of Leicester, Gwendolen Rd, Leicester, LE5 4PW, UK.
Insights
Beta-blocker selectivity impacts mortality risk in diabetic patients. Beta1-selective beta-blockers may reduce death risk in patients experiencing hypoglycaemia, warranting further investigation.
Area of Science:
- Cardiology
- Diabetology
- Pharmacology
Background:
- The relationship between beta-blocker use, selectivity, and outcomes in diabetic patients with and without hypoglycemia remains unclear.
- Hypoglycemia is a common complication in insulin-treated diabetes, potentially influenced by cardiovascular medications.
Purpose of the Study:
- To investigate the association of beta-blocker therapy and selectivity with mortality and cardiovascular events.
- To assess the interaction between beta-blocker use, selectivity, and hypoglycemia in insulin-treated diabetic patients.
Main Methods:
- Utilized the UK CPRD database to identify insulin-treated diabetic patients.
- Captured data on all-cause deaths, cardiovascular events, and hypoglycemic episodes.
- Analyzed the association between beta-blocker therapy (non-selective vs. beta1-selective) and outcomes, considering hypoglycemia as an interaction factor.
Main Results:
- No significant association between any beta-blocker use and mortality risk, irrespective of hypoglycemia.
- Non-selective beta-blockers were linked to a higher mortality risk in patients without hypoglycemia (HR 1.59 [1.22-2.08] post-imputation).
- Beta1-selective beta-blockers showed a potential reduced risk of death in patients with hypoglycemia (HR 0.76 [0.61-0.94] post-imputation).
Conclusions:
- Beta1-selective beta-blockers may offer a survival benefit in diabetic patients experiencing hypoglycemic episodes.
- These findings are exploratory and require validation due to potential confounding by indication.
Background And Aims:
The association of beta-blockers and their selectivity with mortality and cardiovascular events in patients with and without hypoglycaemia is unknown.
Methods And Results:
Insulin-treated patients with diabetes were identified within the UK CPRD database. All-cause deaths, cardiovascular events, and hypoglycaemic episodes were captured to assess the interaction between beta-blocker therapy and selectivity with hypoglycaemia. 13,682 patients, of which 2036 (14.9%) with at least one hypoglycaemic episode, were included; 3148 deaths and 1235 cardiovascular events were recorded during a median of 2.3 and 4.7 years in patients with and without incident hypoglycaemia, respectively. Treatment with any beta-blocker was not associated with risk of death in both patients with and without hypoglycaemia, without significant interaction. Compared to no therapy, non-selective beta-blockers were associated with higher risk of death in patients without hypoglycaemia (hazard ratio (HR) 2.93 [1.26-6.83] in the fully adjusted model) but not in those with hypoglycaemia; interactions was not significant. For beta1-selective beta-blockers, there was no association with mortality in both patients with and without hypoglycaemia, without significant interaction. After missing data imputation, results were consistent for non-selective beta-blockers (HR in patients without hypoglycaemia 1.59 [1.22-2.08]) while indicated a reduced risk of death for beta1-selective beta-blockers in patients with hypoglycaemia (HR 0.76 [0.61-0.94]). Due to few cardiovascular events, complete-case analysis compared only any vs no beta-blocker therapy and indicated no associations with therapy or interaction by hypoglycaemia.
Conclusion:
In patients with hypoglycaemic episodes, treatment with beta1-selective beta-blockers may potentially reduce the risk of death. These explorative findings and the potential role of confounding by indication need to be evaluated in other studies.
More Related Videos
Related Concept Videos
01:11Observational Studies
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One...
02:30Naturalistic Observations
01:17Imaging Studies for Cardiovascular System I:Echocardiography
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
01:28Imaging Studies for Cardiovascular System V: CT
01:20Imaging Studies for Cardiovascular System II:Types of Echocardiography
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for...
01:20Blood Studies for Cardiovascular System I: Cardiac Biomarkers
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...