Key result
Exercise treadmill testing provides cost-effective diagnosis and risk stratification for Brugada syndrome, LQTS, and CPVT.
Why the study?
Diagnosing cardiac channelopathies is challenging due to dynamic presentations, while pharmacological provocation tests and genetic studies face limitations in sensitivity, yield, availability, and interpretation.
Does exercise treadmill test improve the diagnosis and risk stratification in patients with suspected cardiac channelopathies?
Does exercise treadmill test improve the diagnosis and risk stratification in patients with suspected cardiac channelopathies?
Exercise treadmill testing provides a simple, cost-effective method to unmask concealed ECG features and stratify arrhythmic risk in patients with Brugada syndrome, LQTS, and CPVT.
Channelopathies are the leading causes of SCD in patients without structural heart disease. Missing the diagnosis of high-risk but concealed channelopathies could have lethal clinical consequences. However, the diagnosis of channelopathies is often challenging due to the dynamic clinical presentations and elusive ECG manifestations of these diseases. An integrated approach including clinical assessment, repeated electrocardiography, drug provocation tests, exercise stress test and genetic studies is often required for establishing the diagnosis. Pharmacological provocation tests may have limited sensitivity and may be associated with false positive results. Wide-spread use of genetic studies are limited by low yield, cost-effectiveness and availability issue. Variances of unknown significance could also complicate the interpretation of the genetic screening results. This article reviews the roles of exercise stress test in the diagnosis and risk stratification of patients with Brugada Syndrome, Long QT syndrome and catecholaminergic polymorphic ventricular tachycardia.
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Kit Yee Chan (2023) conducted a review in Cardiac channelopathies (Brugada syndrome, long QT syndrome, CPVT). Exercise treadmill test (ETT) was evaluated. Exercise treadmill testing is a useful and cost-effective tool for the diagnosis and risk stratification of patients with Brugada syndrome, long QT syndrome, and CPVT.
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