Specific electrocardiographic features associated with Cushing's disease.
Krystallenia I Alexandraki1, Gregory A Kaltsas, Apostolos-Ilias Vouliotis
1Department of Endocrinology, St Bartholomew's Hospital, London, UK.
Clinical Endocrinology
|April 8, 2011
Summary
Cardiovascular disease (CVD) risk in Cushing's disease (CD) is linked to specific ECG changes. Prolonged QTcd, independent of hypertension, is a key indicator in CD patients.
Area of Science:
- Endocrinology
- Cardiology
- Medical Diagnostics
Background:
- Hypercortisolaemia, a condition of excess cortisol, significantly elevates cardiovascular disease (CVD) risk.
- This risk may stem from direct myocardial effects or exacerbation of traditional CVD risk factors.
Purpose of the Study:
- To determine if electrocardiogram (ECG) alterations in Cushing's disease (CD) can be predicted solely by analyzing associated risk factors.
- Investigate specific ECG parameters in CD patients.
Main Methods:
- Retrospective analysis of 79 CD patients, assessing ECG parameters (QTc, QTcd, ECG-LVH, ECG-RVH), blood pressure, and biochemical/hormonal data.
- Comparison with 42 healthy controls matched for demographics.
Main Results:
- CD patients exhibited higher prevalence of metabolic syndrome, hypertension, CVD, hypercholesterolemia, hypertriglyceridemia, and carbohydrate abnormalities.
- Patients with CD showed significantly longer QTcd, more prevalent left ventricular hypertrophy (LVH) and right ventricular hypertrophy (RVH) compared to controls.
- Prolonged QTcd was independently predicted by CD and ECG-evidenced LVH, irrespective of other risk factors like hypertension.
Conclusions:
- Prolonged QTcd, particularly when associated with ECG evidence of LVH, is a distinctive feature of Cushing's disease.
- These findings may inform therapeutic strategies for CD and its associated comorbidities.
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