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[Clinical considerations apropos of 51 cases of cardiothyrotoxicosis]
Insights
Thyrotoxicosis, especially in the elderly, is often misdiagnosed as heart failure. Early thyroid evaluation is crucial for accurate diagnosis and treatment, even with normal lab results.
Area of Science:
- Cardiology
- Endocrinology
- Geriatrics
Context:
- Thyrotoxicosis presents unique diagnostic challenges in elderly patients.
- Cardiac manifestations of thyrotoxicosis are frequently misdiagnosed as primary cardiac disease.
- Toxic adenoma is a common, yet often overlooked, cause of thyrotoxicosis in this population.
Purpose:
- To analyze the presentation and diagnosis of thyrotoxicosis in a cardiology-focused department.
- To highlight the challenges in recognizing thyrotoxicosis, particularly in older individuals.
- To emphasize the importance of considering thyroid etiology in unexplained heart failure.
Summary:
- A 6-year analysis of 51 thyrotoxicosis cases revealed frequent misdiagnosis in the elderly, often mistaken for 'senile heart'.
- Subtle endocrine signs and normal initial laboratory tests, including thyroid hormone assays, can obscure the diagnosis.
- Toxic adenoma was a notable cause, presenting with reduced endocrine semiology.
Impact:
- Promotes systematic thyroid evaluation for unexplained heart failure, regardless of sinus rhythm or cholesterol levels.
- Underscores the utility of radio-isotope examinations for definitive diagnosis when clinical suspicion is high.
- Aims to improve diagnostic accuracy and timely management of thyrotoxicosis in cardiac patients.
Abstract:
A series of 51 cases of thyrotoxicosis gathered during a period of 6 years in a department with a cardiological orientation is analysed. This peculiar form of thyrotoxicosis is often unrecognized in view of its frequent occurence in aged subjects (which is misdiagnosed as "senile heart") and of the incidence in its causality of a toxic adenoma, the endocrine semiology of which is often reduced. In front of any case of heart failure of unknown cause, one should systematically think of a thyroid aetiology. A persistent sinus rhythm is not enough to discard it. A low cholesterol rate should induce to continue the investigation. The subnormal character of the classical laboratory parameters (including the thyroid hormone assay) does not always make it possible to exclude definitely the diagnosis. When the clinical picture is suggestive, only the radio-isotope examination with dynamic tests is liable to provide decisive data.