Trial reportDiabetologia2004
Effects of metoprolol on QT interval and QT dispersion in Type 1 diabetic patients with abnormal albuminuria.
Trial report in Diabetologia, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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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.
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Who cites it
2 citing papers in PubMed, 7 citations in OpenAlex.
- The Efficacy of Beta-Blockers in Patients With Long QT Syndrome 1-3 According to Individuals' Gender, Age, and QTc Intervals: A Network Meta-analysis.Frontiers in pharmacology · 2020Review
- Hypoglycemia-associated electroencephalogram and electrocardiogram changes appear simultaneously.Journal of diabetes science and technology · 2013Article
Corrections and comments
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aims/hypothesisThe excess mortality in diabetes is mainly due to cardiovascular causes and almost confined to patients with abnormal albuminuria. Compared to healthy subjects, diabetic patients have a prolonged QT interval and increased QT dispersion. In non-diabetic subjects, as well as in Type 1 diabetic patients with overt nephropathy, a prolonged QT interval and increased QT dispersion are associated with cardiac morbidity and mortality. There is an increasing number of studies on effects of beta blocker treatment on QT interval and QT dispersion in non-diabetic subjects. In contrast, there are no studies on the effects of beta blocker treatment on QT interval and QT dispersion in patients with diabetes. The aim of our study was to describe the effects of metoprolol treatment on QT interval and QT dispersion in a group of well-characterised Type 1 diabetic patients with elevated urine albumin excretion.
methodsWe studied the effects of 6 weeks of treatment with metoprolol (100 mg once daily, zero order kinetics formulation) in a randomised, placebo-controlled, double blind, crossover trial including 20 Type 1 diabetic patients. Patients were simultaneously monitored under ambulatory conditions with 24-h Holter-monitoring, 24-h ambulatory blood pressure recording and 24-h fractionated urine collections. On days of investigation 12-lead electrocardiograms were recorded and autonomic tests performed.
resultsWe found strong associations between both daytime and night-time blood pressure and heart-rate-corrected QT interval dispersion (QTc dispersion). Heart rate variability parameters indicating sympathetic and parasympathetic modulation showed strong correlations with heart-rate-corrected QT interval (QTc interval) and with QTc dispersion. Beta blocker treatment caused a decrease in QTc interval but no change in QTc dispersion. CONCLUSIONS/
interpretationThis study is the first to address the QTc interval and QTc dispersion in Type 1 diabetic patients treated with metoprolol. Beta blocker treatment caused a decrease in QTc interval but no change in QTc dispersion. These results may in part explain the pronounced cardioprotective effect of beta blocker treatment in diabetic patients with cardiovascular disease.
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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.