Atrioventricular Block: An Unusual Presentation of Overactive Thyroid

Bhattad, Pradnya Brijmohan; Yukselen, Zeynep; Filiberti, Allen

doi:10.7759/cureus.35141

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…The decline of fT3 levels is responsible for most of the atrial and ventricular anti-arrhythmic effects of Amiodarone [41][42][43][44]48]. Strict monitoring of thyroid function is recommended while administering Amiodarone therapy [48][49][50].…”

Section: Thyrotoxicosis and Amiodaronementioning

confidence: 99%

Cardio-Thyrotoxicosis Syndrome: A Review of Thyrotoxic Cardiovascular Disease

Bhattad¹,

Roumia²

2023

Cureus

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Thyrotoxicosis, an endocrine disorder characterized by elevated serum thyroid hormone levels of triiodothyronine (T3) and/or thyroxine (T4), can impact cardiovascular health in several ways. The cardiovascular system is often severely targeted by the thyrotoxic state, and the term "Cardio-thyrotoxic syndrome" has been proposed to encompass the various cardiovascular disease states resulting from thyrotoxicosis. In this review, we discuss various cardiovascular disorders resulting from the effects of thyrotoxicosis. It is important to keep a high index of suspicion for thyroid disorder in the setting of new atrial fibrillation, heart failure, and tachycardia-induced cardiomyopathy. Management of cardiothyrotoxicosis involves control of heart rate and blood pressure and treatment of acute cardiovascular complications. Thyroid-specific therapy to achieve a euthyroid state will not only improve but even potentially reverse cardiovascular abnormalities.

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Section: Thyrotoxicosis and Amiodaronementioning

confidence: 99%

Cardio-Thyrotoxicosis Syndrome: A Review of Thyrotoxic Cardiovascular Disease

Bhattad¹,

Roumia²

2023

Cureus

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“…Bradycardia is a well-known risk factor predisposing to torsade de pointes (TdP) primarily due to prolonged QT interval [1][2]. The heart rate in the repolarization time has an inverse relationship, probably accounting for bradycardia-induced QT prolongation.…”

Section: Introductionmentioning

confidence: 99%

Bradycardia-Induced Torsades de Pointes in Atrioventricular Block

Bhattad¹,

Jha²,

Wholey³

2023

Cureus

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Bradycardia is known to prolong QT interval. Persistent bradycardia and high-grade atrioventricular (AV) block may lead to persistently prolonged QTc interval with a risk for life-threatening ventricular arrhythmias, which needs addressing the underlying cause.We present the case of a patient with persistent sinus bradycardia with a high-grade AV block leading to persistently prolonged QTc without any reversible etiology that resulted in torsades de pointes. The underlying treatment involved shortening the QTc by increasing the heart rate to prevent any further episodes of polymorphic ventricular tachycardia.

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Atrioventricular Block: An Unusual Presentation of Overactive Thyroid

Cited by 2 publications

References 15 publications

Cardio-Thyrotoxicosis Syndrome: A Review of Thyrotoxic Cardiovascular Disease

Cardio-Thyrotoxicosis Syndrome: A Review of Thyrotoxic Cardiovascular Disease

Bradycardia-Induced Torsades de Pointes in Atrioventricular Block

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